ISO 23684:2023
(Main)Road vehicles — Technical personnel dealing with natural gas vehicles (NGVs) — Training and qualification
Road vehicles — Technical personnel dealing with natural gas vehicles (NGVs) — Training and qualification
This document specifies the requirements for the provisions of personnel dealing with the operation on natural gases (NG) fuelled vehicles in order to demonstrate their competence. This document specifies the minimum requirements for training and qualification of personnel according to the level of safety required by the activity.
Véhicules routiers — Personnel technique s'occupant des véhicules au gaz naturel (GNV) — Programmes de formation et de qualification
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INTERNATIONAL ISO
STANDARD 23684
First edition
2023-04
Road vehicles — Technical personnel
dealing with natural gas vehicles
(NGVs) — Training and qualification
Véhicules routiers — Personnel technique s'occupant des véhicules au
gaz naturel (GNV) — Programmes de formation et de qualification
Reference number
ISO 23684:2023(E)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 23684:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 23684:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Figures involved on NGVs use and operations. 5
4.1 General . 5
4.2 Professionals on workshop . 6
4.2.1 Technical manager of workshop . 6
4.2.2 Operators on workshop. 7
4.3 Professionals on CNG, LNG and L-CNG fuelling station . 7
4.3.1 Technical manager of CNG, LNG and L-CNG fuelling station . 7
4.3.2 Operators of CNG, LNG and L-CNG fuelling station . 7
4.4 Professionals on parking and garages . 7
5 Requirements for figures involved on NGVs use and operation . 8
5.1 Professionals on workshop . 8
5.1.1 Technical manager of workshop facilities (Table 1) . 8
5.1.2 Operators on workshop (Table 2) . 10
5.2 Professionals on CNG, LNG and L-CNG fuelling station .12
5.2.1 Technical manager of CNG, LNG and L-CNG fuelling station .12
5.2.2 Operators of CNG, LNG and L-CNG fuelling station (Table 4) . 14
5.3 Professional on parking.15
6 Training .16
6.1 General . 16
6.2 Training course . 17
6.3 Requirements related to the theoretical-practical professional training courses . 17
6.3.1 Recognized training course . 17
6.3.2 Competence of trainers . 17
6.3.3 Training method . 18
6.3.4 Training bodies . 18
6.3.5 Training location . 18
6.4 General on training for workshop professional . 18
6.4.1 Technical manager of workshop . 18
6.4.2 Main knowledge of the course . 18
6.5 Workshop operator . . 19
6.5.1 Main knowledge of the course . 19
6.6 Technical manager of CNG /LNG / L-CNG fuelling station . 19
6.6.1 Training for technical managers of CNG/LNG/L-CNG fuelling stations .20
6.7 Operator of CNG/LNG/L-CNG fuelling stations . 20
6.7.1 Training for operator of CNG/LNG/L-CNG fuelling stations .20
7 Competence assessment and qualification achievement .20
7.1 Final examination . 21
8 Qualification levels .21
9 Type of qualification .21
10 Authorized qualification body .21
Annex A (normative) E-learning and e-learning requirements .23
Annex B (informative) Topics of the workshop technical manager course .27
Annex C (informative) Training for technical managers of CNG/LNG/L-CNG fuelling stations .29
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ISO 23684:2023(E)
Bibliography .30
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ISO 23684:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
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ISO 23684:2023(E)
Introduction
Since the effectiveness of any application on natural gas vehicles (NGVs) depends upon the capabilities
of the persons who perform or are responsible, a procedure has been developed to provide a means
of evaluating and documenting the competence of personnel whose duties require the appropriate
theoretical and practical knowledge of the work they perform, specify, supervise, monitor or evaluate.
When certification of personnel working on NGVs is required in product standards, regulations, codes
or specifications, it is important to certify the personnel in accordance with this document. When
latitude is provided in the criteria within this document, the certification body has the final decision in
determining specific requirements.
When there is no mandatory requirement in national legislation, or in case a member State does not
adopt this document concerning certification of NGV’s personnel, the employers of such personnel take
the steps to decide how to ensure themselves that employees are competent to do the work assignment.
Thus, they may employ people who are already certified or they may apply their own expertise and
under their responsibility ensure themselves that their employee has the necessary competence.
This document gives particular emphasis on:
— the way in which qualifications are expressed;
— application of the principle that “learning outcomes” are crucial instead of the path to allow
transferability between formal, informal and non-formal areas.
This document is mainly directed to:
— workshop personnel,
— vehicle park owner/personnel,
— NGV dealer/owner,
— CNG, LNG and L-CNG fuelling station owner/personnel,
— first responders,
— inspectors,
— training course providers,
— certification bodies,
— original equipment manufacturer (OEM),
— system manufacturer,
— workshop owner/operator,
— CNG and L-CNG fuelling station owner/operator,
— parking and garages owner/operator.
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INTERNATIONAL STANDARD ISO 23684:2023(E)
Road vehicles — Technical personnel dealing with natural
gas vehicles (NGVs) — Training and qualification
1 Scope
This document specifies the requirements for the provisions of personnel dealing with the operation on
natural gases (NG) fuelled vehicles in order to demonstrate their competence.
This document specifies the minimum requirements for training and qualification of personnel
according to the level of safety required by the activity.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
ability
capacity and human attribute to perform an activity
[SOURCE: ISO/IEC TS 17027:2014, 2.1, modified — The phrase "and human attribute" was added.]
3.2
authorized qualification body
body, independent of the NGV workshop (3.20), authorized by the certification body (3.4) to prepare and
administer qualification (3.24) examinations
Note 1 to entry: Qualification examination is an activity administered by the certification body or the authorized
qualification body, which assesses the general, specific and practical knowledge and the skill (3.28) of the
candidate.
[SOURCE: ISO 9712:2021, 3.2, modified — "employer" has been changed to "NGV workshop", the word
"qualifications" and the Note 1 to entry were added.]
3.3
certification
third party attestation related to products, processes, systems, or persons
[SOURCE: ISO 7240-1:2014, 2.1.16]
3.4
certification body
third-party conformity assessment body operating certification (3.3) schemes
Note 1 to entry: A certification body can be non-governmental or governmental (with or without regulatory
authority).
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ISO 23684:2023(E)
Note 2 to entry: A conformity assessment body is a body that performs conformity assessment activities and that
can be the object of accreditation.
Note 3 to entry: A third-party conformity assessment is the conformity assessment activity that is performed by
a person or body that is independent of the person or organization that provides the object, and of user interests
in that object
[SOURCE: ISO/IEC 17065:2012, 3.12, modified — Notes 2 and 3 to entry were added.]
3.5
competence
ability (3.1) to apply knowledge and skills (3.28) to achieve intended results
[SOURCE: ISO/IEC 17024:2012, 3.6]
3.6
competence assessment
formal outcome of an evaluation process (e.g. examination) and validation by means of objective
elements, obtained when a competent body (3.7) states that the learning outcomes of a person meet
given standards and safety regulations
3.7
competent body
person or corporate body, defined by the national or relevant authority, which by combination of
appropriate qualification (3.24), training (3.32), experience and resources is able to make objective
judgments on a subject
[SOURCE: ISO 10691:2004, 3.2]
3.8
competent person
person who has acquired, through training (3.32), qualification (3.24), experience or a combination of
these, the knowledge and skill (3.28) enabling that person to correctly perform the required tasks
[SOURCE: ISO 11525-1:2020, 3.4]
3.9
CNG
compressed natural gas
natural gas (3.18) which has been compressed and stored for use as a vehicle fuel
[SOURCE: ISO 15500-1:2015, 3.2]
3.10
CNG cylinder
any container used for the storage of compressed natural gas (CNG) (3.9) according to the following
classifications:
— CNG-1: an all metal cylinder
— CNG-2: a hoop wrapped cylinder with a load-sharing metal liner and composite reinforcement on
the cylindrical part only
— CNG-3: a fully wrapped cylinder with a load-sharing metal liner and composite reinforcement on
both the cylindrical part and dome ends
— CNG-4: a fully wrapped cylinder with a non-load sharing non-metallic liner and composite
reinforcement on both the cylindrical part and dome ends
3.11
garage
building used for the storage and servicing of NGVs
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ISO 23684:2023(E)
3.12
formal training
organized and documented program of learning activities designed to impart the knowledge and skills
(3.28) necessary to be qualified to this document
3.13
fuelling station
facility at which vehicle fuels are dispensed
3.14
learning outcome
what a person is expected to know, understand or be able to do at the end of a training programme,
course or module
[SOURCE: ISO/IEC TS 17027:2014, 2.57]
3.15
LNG
liquefied natural gas
natural gas (3.18) which has been liquefied, after processing, for storage or transportation purposes
[SOURCE: ISO 16924:2016, 3.38]
3.16
L-CNG fuelling station
facility at which compressed natural gas (CNG) (3.9) derived from liquefied natural gas (LNG) (3.15) is
dispensed to vehicles
3.17
LNG fuelling station
facility at which liquefied natural gas (3.15) is dispensed to vehicles
3.18
natural gas
NG
complex gaseous mixture of hydrocarbons primarily methane, but which generally includes ethane,
propane and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon
dioxide
Note 1 to entry: The definition includes renewable natural gas (biogas, biomethane, etc.).
[SOURCE: ISO 14532:2014, 2.1.1.1, modified — Note 1 to entry was replaced.]
3.19
natural gas vehicle
NGV
road vehicle that is powered, either fully or partially, by natural gas (3.18) stored on board vehicle in
liquid or/and gaseous form
3.20
NGV workshop
competent organization, appropriately equipped, that assumes technical responsibility for correct and
safe service, inspection, repair and retrofit on compressed natural gas (CNG) (3.9) or liquefied natural
gas (LNG) (3.15) vehicles
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ISO 23684:2023(E)
3.21
notified body
independent, accredited body which is entitled by an authorized accrediting body
Note 1 to entry: Upon definition of standards and regulations, the accrediting body may allow a notified body to
provide verification and certification (3.3) services. These services are meant to ensure and assess compliance
to the previously defined standards and regulations, but also to provide an official certification (3.3) mark or a
declaration of conformity.
3.22
operator
person working in an NGV workshop (3.20) or in a compressed natural gas (CNG) (3.9) /LNG/L-CNG
fuelling station (3.16) under the supervision of the competent person (3.8)
3.23
practical examination
assessment of practical skills (3.28), in which the candidate demonstrates familiarity with, and the
ability (3.1) to perform, the test
3.24
qualification
demonstrated education, training (3.32), and work experience, where applicable, required to properly
perform the assigned task as awarded or conferred as described in the document.
Note 1 to entry: Adapted from ISO/IEC 17024:2012, 3.7 and ISO/IEC 19479:2019.
3.25
qualification level
Level 1: the learning outcomes relevant to Level 1 are basic general knowledge
Level 2: the learning outcomes relevant to Level 2 are basic factual knowledge of a field of work or study
Level 3: the learning outcomes relevant to Level 3 are knowledge of facts, principles, processes and
general concepts, in a field of work or study
Level 4: the learning outcomes relevant to Level 4 are factual and theoretical knowledge in broad con-
texts within a field of work or study
Level 5: the learning outcomes relevant to Level 5 are comprehensive, specialized, factual and theoretical
knowledge within a field of work or study and an awareness of the boundaries of that knowledge
3.26
qualified person
individual subjected to qualification process which has passed the qualification (3.24)
3.27
recognized training course
training course which contents (for instance: qualification (3.24) of teachers, training procedures,
documents, examination program and procedures) are assessed against applicable standards and
approved by a certification body (3.4)
3.28
skill
ability (3.1) to perform a task or activity with a specific intended outcome acquired through education,
training (3.32), experience or other means
[SOURCE: ISO/IEC/TS 17027:2014, 2.74]
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ISO 23684:2023(E)
3.29
skilled organization
entity comprising multiple people, such as an institution or an association, that has a collective goal and
is linked to an external environment and shall be recognized by National Authorities for the specific
field of application
3.30
system manufacturer
company which can assume technical responsibility for the manufacturing or retrofitting of NGV fuel
system and can demonstrate that it possesses the features required and the necessary means to provide
quality assessment and conformity of production of the NGV fuel system
[SOURCE: Reference [14], 2.3, modified — "LPG and CNG" have been replaced by "NGV fuel system".]
3.31
technical manager
qualified person (3.26) that takes responsibility for decisions relating to parking, fuelling, installation,
maintenance and repair of an NGV system
Note 1 to entry: See also EN 13423.
3.32
training
activities designed to facilitate the learning and development of knowledge, skills (3.31), and abilities,
and to improve the performance of specific tasks or roles
[SOURCE: ISO 22398:2013, 3.23]
3.33
training course provider
organization competent to provide training (3.32) by specific courses to persons carrying out operations
or activities on an NGV
3.34
LNG tank
any storage system used for liquefied natural gas (LNG) (3.15)
4 Figures involved on NGVs use and operations
4.1 General
Figures operating on NGVs, as per subject of this document, shall be differentiated by their own
responsibilities.
This shall be defined by the following areas of relevance:
— workshop;
— CNG, LNG and L-CNG fuelling station;
— parking and garage.
Figure 1 is an example of how this document applies.
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ISO 23684:2023(E)
Figure 1 — Application of this document
4.2 Professionals on workshop
Different qualification levels are defined as follows:
— technical manager;
— operator.
4.2.1 Technical manager of workshop
The technical manager is a competent person who has a high level of skill, knowledge and abilities in
installing and maintaining an NGV system, as defined in 5.1.1. The technical manager is responsible for
the declaration of conformity provided for the activities performed or supervised on NGVs.
The technical manager has technical autonomy and he or she is able to perform independently on or to
supervise and coordinate any operation on NGVs.
Level 4 or higher of qualification shall be appropriate for this person.
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ISO 23684:2023(E)
4.2.2 Operators on workshop
Operators have a basic level knowledge of vehicles, their main components and NGVs, as defined in 5.1.2.
They act (partially independent) to perform the installation or maintenance work under technical
manager supervision.
Level 2 or higher of qualification shall be appropriate for this person.
4.3 Professionals on CNG, LNG and L-CNG fuelling station
Different qualification levels are defined as follow:
— technical manager;
— operator.
4.3.1 Technical manager of CNG, LNG and L-CNG fuelling station
The technical manager is a competent person who has a high level of skill, knowledge and abilities to
provide proper and safe fuelling of NGVs, as defined in 5.2.1.
The technical manager has technical autonomy and he or she is able to perform independently on or to
supervise and coordinate the fuelling operations.
Level 3 or higher of qualification shall be appropriate for this person.
4.3.2 Operators of CNG, LNG and L-CNG fuelling station
Operators have a basic level knowledge about fuelling operation of NGVs, as defined in 5.2.2.
They act (partially independent) under the mandate of the technical manager of the fuelling station.
Change to requirement (not in note) and make a list of task and corresponding competence level
required.
4.4 Professionals on parking and garages
The person involved in parking or garages activities has the competence defined in 5.3.
Level 2 or higher of qualification shall be appropriate for this person.
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ISO 23684:2023(E)
5 Requirements for figures involved on NGVs use and operation
5.1 Professionals on workshop
5.1.1 Technical manager of workshop facilities (Table 1)
Table 1 — Skills, abilities and knowledge of technical manager of workshop
Technical/professional skills Abilities Knowledge
Technical manager shall be able to Relevant abilities to every skill Relevant knowledge to every skill
1) Plan and manage independently a) To apply procedures to plan — Elements of planning
the activities of installation and manage installation or
— Processes and work cycles for
and/or maintenance and maintenance of NGVs
car repair garage
repair OEM and/or retrofitted
b) To prepare documentation,
NGVs, providing instructions,
— Time and methods
materials, equipment and
directives and information for
tools for the different
the operatives.
— Warehouse management
activities
procedures (stock management,
warehousing and materials
handling)
— Maintenance, diagnostic
procedures and related tools
2) Apply the applicable regulations a) To identify the applicable — Applicable regulations
to the operations including regulations for NGVs
— Health risks for the specific
safety and take decisions operation and working areas
jobs, methods of prevention
accordingly.
b) To check that operators have and protection (especially the
the necessary competence explosion risk)
and knowledge on applicable
— Specific risks for the
regulations, procedures,
environment and prevention and
contractual terms, risks
protection methods
associated with the task to
be performed
— Natural gas characteristics, safe
use and handling
c) To check the prevention and
protection measures for the
— Technical rules concerning
environment and health and
the approval of vehicles,
safety at work
components and systems
d) To assess suitability
— Operating procedures
and conformity of the
components depending on
vehicles approval
e) To interact with the
responsible body for the
control and testing activities
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ISO 23684:2023(E)
TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
Technical/professional skills Abilities Knowledge
Technical manager shall be able to Relevant abilities to every skill Relevant knowledge to every skill
3) Keep to and improve the a) To use the specific — Engine and fuel systems
workshop internal procedures documentation correctly principles, mechanisms and
and instructions in accordance (e.g. manuals, diagrams, working parameters
with technical manual of the drawings, procedures, BoM
— Types and characteristics of
OEM or retrofitted NGVs. and specific instructions for
the main components of fuel
the different activities) both
systems
in electronic and in paper
form
— Diagnostics software and
hardware
b) To identify tools and working
sequences to be performed
c) To use appropriate tools for
diagnostics and inspection
4) Supervise and coordinate the a) To provide specific training — Use, maintenance and upg
...
INTERNATIONAL ISO
STANDARD 23684
First edition
Road vehicles — Technical personnel
dealing with natural gas vehicles
(NGVs) — Training and qualification
Véhicules routiers — Personnel technique s'occupant des véhicules au
gaz naturel (GNV) — Programmes de formation et de qualification
PROOF/ÉPREUVE
Reference number
ISO 23684:2023(E)
© ISO 2023
---------------------- Page: 1 ----------------------
ISO 23684:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
PROOF/ÉPREUVE © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 23684:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Figures involved on NGVs use and operations. 5
4.1 General . 5
4.2 Professionals on workshop . 6
4.2.1 Technical manager of workshop . 6
4.2.2 Operators on workshop. 7
4.3 Professionals on CNG, LNG and L-CNG fuelling station . 7
4.3.1 Technical manager of CNG, LNG and L-CNG fuelling station . 7
4.3.2 Operators of CNG, LNG and L-CNG fuelling station . 7
4.4 Professionals on parking and garages . 7
5 Requirements for figures involved on NGVs use and operation . 8
5.1 Professionals on workshop . 8
5.1.1 Technical manager of workshop facilities (Table 1) . 8
5.1.2 Operators on workshop (Table 2) . 10
5.2 Professionals on CNG, LNG and L-CNG fuelling station .12
5.2.1 Technical manager of CNG, LNG and L-CNG fuelling station .12
5.2.2 Operators of CNG, LNG and L-CNG fuelling station (Table 4) . 14
5.3 Professional on parking.15
6 Training .16
6.1 General . 16
6.2 Training course . 17
6.3 Requirements related to the theoretical-practical professional training courses . 17
6.3.1 Recognized training course . 17
6.3.2 Competence of trainers . 17
6.3.3 Training method . 18
6.3.4 Training bodies . 18
6.3.5 Training location . 18
6.4 General on training for workshop professional . 18
6.4.1 Technical manager of workshop . 18
6.4.2 Main knowledge of the course . 18
6.5 Workshop operator . . 19
6.5.1 Main knowledge of the course . 19
6.6 Technical manager of CNG /LNG / L-CNG fuelling station . 19
6.6.1 Training for technical managers of CNG/LNG/L-CNG fuelling stations .20
6.7 Operator of CNG/LNG/L-CNG fuelling stations . 20
6.7.1 Training for operator of CNG/LNG/L-CNG fuelling stations .20
7 Competence assessment and qualification achievement .20
7.1 Final examination . 21
8 Qualification levels .21
9 Type of qualification .21
10 Authorized qualification body .21
Annex A (normative) E-learning and e-learning requirements .23
Annex B (informative) Topics of the workshop technical manager course .27
Annex C (informative) Training for technical managers of CNG/LNG/L-CNG fuelling stations .29
iii
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ISO 23684:2023(E)
Bibliography .30
iv
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ISO 23684:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41,
Specific aspects for gaseous fuels.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
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---------------------- Page: 5 ----------------------
ISO 23684:2023(E)
Introduction
Since the effectiveness of any application on natural gas vehicles (NGVs) depends upon the capabilities
of the persons who perform or are responsible, a procedure has been developed to provide a means
of evaluating and documenting the competence of personnel whose duties require the appropriate
theoretical and practical knowledge of the work they perform, specify, supervise, monitor or evaluate.
When certification of personnel working on NGVs is required in product standards, regulations, codes
or specifications, it is important to certify the personnel in accordance with this document. When
latitude is provided in the criteria within this document, the certification body has the final decision in
determining specific requirements.
When there is no mandatory requirement in national legislation, or in case a member State does not
adopt this document concerning certification of NGV’s personnel, the employers of such personnel take
the steps to decide how to ensure themselves that employees are competent to do the work assignment.
Thus, they may employ people who are already certified or they may apply their own expertise and
under their responsibility ensure themselves that their employee has the necessary competence.
This document gives particular emphasis on:
— the way in which qualifications are expressed;
— application of the principle that “learning outcomes” are crucial instead of the path to allow
transferability between formal, informal and non-formal areas.
This document is mainly directed to:
— workshop personnel,
— vehicle park owner/personnel,
— NGV dealer/owner,
— CNG, LNG and L-CNG fuelling station owner/personnel,
— first responders,
— inspectors,
— training course providers,
— certification bodies,
— original equipment manufacturer (OEM),
— system manufacturer,
— workshop owner/operator,
— CNG and L-CNG fuelling station owner/operator,
— parking and garages owner/operator.
vi
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INTERNATIONAL STANDARD ISO 23684:2023(E)
Road vehicles — Technical personnel dealing with natural
gas vehicles (NGVs) — Training and qualification
1 Scope
This document specifies the requirements for the provisions of personnel dealing with the operation on
natural gases (NG) fuelled vehicles in order to demonstrate their competence.
This document specifies the minimum requirements for training and qualification of personnel
according to the level of safety required by the activity.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
ability
capacity and human attribute to perform an activity
[SOURCE: ISO/IEC TS 17027:2014, 2.1, modified — The phrase "and human attribute" was added.]
3.2
authorized qualification body
body, independent of the NGV workshop (3.20), authorized by the certification body (3.4) to prepare and
administer qualification (3.24) examinations
Note 1 to entry: Qualification examination is an activity administered by the certification body or the authorized
qualification body, which assesses the general, specific and practical knowledge and the skill (3.28) of the
candidate.
[SOURCE: ISO 9712:2021, 3.2, modified — "employer" has been changed to "NGV workshop", the word
"qualifications" and the Note 1 to entry were added.]
3.3
certification
third party attestation related to products, processes, systems, or persons
[SOURCE: ISO 7240-1:2014, 2.1.16]
3.4
certification body
third-party conformity assessment body operating certification (3.3) schemes
Note 1 to entry: A certification body can be non-governmental or governmental (with or without regulatory
authority).
1
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ISO 23684:2023(E)
Note 2 to entry: A conformity assessment body is a body that performs conformity assessment activities and that
can be the object of accreditation.
Note 3 to entry: A third-party conformity assessment is the conformity assessment activity that is performed by
a person or body that is independent of the person or organization that provides the object, and of user interests
in that object
[SOURCE: ISO/IEC 17065:2012, 3.12, modified — Notes 2 and 3 to entry were added.]
3.5
competence
ability (3.1) to apply knowledge and skills (3.28) to achieve intended results
[SOURCE: ISO/IEC 17024:2012, 3.6]
3.6
competence assessment
formal outcome of an evaluation process (e.g. examination) and validation by means of objective
elements, obtained when a competent body (3.7) states that the learning outcomes of a person meet
given standards and safety regulations
3.7
competent body
person or corporate body, defined by the national or relevant authority, which by combination of
appropriate qualification (3.24), training (3.32), experience and resources is able to make objective
judgments on a subject
[SOURCE: ISO 10691:2004, 3.2]
3.8
competent person
person who has acquired, through training (3.32), qualification (3.24), experience or a combination of
these, the knowledge and skill (3.28) enabling that person to correctly perform the required tasks
[SOURCE: ISO 11525-1:2020, 3.4]
3.9
CNG
compressed natural gas
natural gas (3.18) which has been compressed and stored for use as a vehicle fuel
[SOURCE: ISO 15500-1:2015, 3.2]
3.10
CNG cylinder
any container used for the storage of compressed natural gas (CNG) (3.9) according to the following
classifications:
— CNG-1: an all metal cylinder
— CNG-2: a hoop wrapped cylinder with a load-sharing metal liner and composite reinforcement on
the cylindrical part only
— CNG-3: a fully wrapped cylinder with a load-sharing metal liner and composite reinforcement on
both the cylindrical part and dome ends
— CNG-4: a fully wrapped cylinder with a non-load sharing non-metallic liner and composite
reinforcement on both the cylindrical part and dome ends
3.11
garage
building used for the storage and servicing of NGVs
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ISO 23684:2023(E)
3.12
formal training
organized and documented program of learning activities designed to impart the knowledge and skills
(3.28) necessary to be qualified to this document
3.13
fuelling station
facility at which vehicle fuels are dispensed
3.14
learning outcome
what a person is expected to know, understand or be able to do at the end of a training programme,
course or module
[SOURCE: ISO/IEC TS 17027:2014, 2.57]
3.15
LNG
liquefied natural gas
natural gas (3.18) which has been liquefied, after processing, for storage or transportation purposes
[SOURCE: ISO 16924:2016, 3.38]
3.16
L-CNG fuelling station
facility at which compressed natural gas (CNG) (3.9) derived from liquefied natural gas (LNG) (3.15) is
dispensed to vehicles
3.17
LNG fuelling station
facility at which liquefied natural gas (3.15) is dispensed to vehicles
3.18
natural gas
NG
complex gaseous mixture of hydrocarbons primarily methane, but which generally includes ethane,
propane and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon
dioxide
Note 1 to entry: The definition includes renewable natural gas (biogas, biomethane, etc.).
[SOURCE: ISO 14532:2014, 2.1.1.1, modified — Note 1 to entry was replaced.]
3.19
natural gas vehicle
NGV
road vehicle that is powered, either fully or partially, by natural gas (3.18) stored on board vehicle in
liquid or/and gaseous form
3.20
NGV workshop
competent organization, appropriately equipped, that assumes technical responsibility for correct and
safe service, inspection, repair and retrofit on compressed natural gas (CNG) (3.9) or liquefied natural
gas (LNG) (3.15) vehicles
3
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ISO 23684:2023(E)
3.21
notified body
independent, accredited body which is entitled by an authorized accrediting body
Note 1 to entry: Upon definition of standards and regulations, the accrediting body may allow a notified body to
provide verification and certification (3.3) services. These services are meant to ensure and assess compliance
to the previously defined standards and regulations, but also to provide an official certification (3.3) mark or a
declaration of conformity.
3.22
operator
person working in an NGV workshop (3.20) or in a compressed natural gas (CNG) (3.9) /LNG/L-CNG
fuelling station (3.16) under the supervision of the competent person (3.8)
3.23
practical examination
assessment of practical skills (3.28), in which the candidate demonstrates familiarity with, and the
ability (3.1) to perform, the test
3.24
qualification
demonstrated education, training (3.32), and work experience, where applicable, required to properly
perform the assigned task as awarded or conferred as described in the document.
Note 1 to entry: Adapted from ISO/IEC 17024:2012, 3.7 and ISO/IEC 19479:2019.
3.25
qualification level
Level 1: the learning outcomes relevant to Level 1 are basic general knowledge
Level 2: the learning outcomes relevant to Level 2 are basic factual knowledge of a field of work or study
Level 3: the learning outcomes relevant to Level 3 are knowledge of facts, principles, processes and
general concepts, in a field of work or study
Level 4: the learning outcomes relevant to Level 4 are factual and theoretical knowledge in broad con-
texts within a field of work or study
Level 5: the learning outcomes relevant to Level 5 are comprehensive, specialized, factual and theoretical
knowledge within a field of work or study and an awareness of the boundaries of that knowledge
3.26
qualified person
individual subjected to qualification process which has passed the qualification (3.24)
3.27
recognized training course
training course which contents (for instance: qualification (3.24) of teachers, training procedures,
documents, examination program and procedures) are assessed against applicable standards and
approved by a certification body (3.4)
3.28
skill
ability (3.1) to perform a task or activity with a specific intended outcome acquired through education,
training (3.32), experience or other means
[SOURCE: ISO/IEC/TS 17027:2014, 2.74]
4
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ISO 23684:2023(E)
3.29
skilled organization
entity comprising multiple people, such as an institution or an association, that has a collective goal and
is linked to an external environment and shall be recognized by National Authorities for the specific
field of application
3.30
system manufacturer
company which can assume technical responsibility for the manufacturing or retrofitting of NGV fuel
system and can demonstrate that it possesses the features required and the necessary means to provide
quality assessment and conformity of production of the NGV fuel system
[SOURCE: Reference [14], 2.3, modified — "LPG and CNG" have been replaced by "NGV fuel system".]
3.31
technical manager
qualified person (3.26) that takes responsibility for decisions relating to parking, fuelling, installation,
maintenance and repair of an NGV system
Note 1 to entry: See also EN 13423.
3.32
training
activities designed to facilitate the learning and development of knowledge, skills (3.31), and abilities,
and to improve the performance of specific tasks or roles
[SOURCE: ISO 22398:2013, 3.23]
3.33
training course provider
organization competent to provide training (3.32) by specific courses to persons carrying out operations
or activities on an NGV
3.34
LNG tank
any storage system used for liquefied natural gas (LNG) (3.15)
4 Figures involved on NGVs use and operations
4.1 General
Figures operating on NGVs, as per subject of this document, shall be differentiated by their own
responsibilities.
This shall be defined by the following areas of relevance:
— workshop;
— CNG, LNG and L-CNG fuelling station;
— parking and garage.
Figure 1 is an example of how this document applies.
5
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ISO 23684:2023(E)
Figure 1 — Application of this document
4.2 Professionals on workshop
Different qualification levels are defined as follows:
— technical manager;
— operator.
4.2.1 Technical manager of workshop
The technical manager is a competent person who has a high level of skill, knowledge and abilities in
installing and maintaining an NGV system, as defined in 5.1.1. The technical manager is responsible for
the declaration of conformity provided for the activities performed or supervised on NGVs.
The technical manager has technical autonomy and he or she is able to perform independently on or to
supervise and coordinate any operation on NGVs.
Level 4 or higher of qualification shall be appropriate for this person.
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ISO 23684:2023(E)
4.2.2 Operators on workshop
Operators have a basic level knowledge of vehicles, their main components and NGVs, as defined in 5.1.2.
They act (partially independent) to perform the installation or maintenance work under technical
manager supervision.
Level 2 or higher of qualification shall be appropriate for this person.
4.3 Professionals on CNG, LNG and L-CNG fuelling station
Different qualification levels are defined as follow:
— technical manager;
— operator.
4.3.1 Technical manager of CNG, LNG and L-CNG fuelling station
The technical manager is a competent person who has a high level of skill, knowledge and abilities to
provide proper and safe fuelling of NGVs, as defined in 5.2.1.
The technical manager has technical autonomy and he or she is able to perform independently on or to
supervise and coordinate the fuelling operations.
Level 3 or higher of qualification shall be appropriate for this person.
4.3.2 Operators of CNG, LNG and L-CNG fuelling station
Operators have a basic level knowledge about fuelling operation of NGVs, as defined in 5.2.2.
They act (partially independent) under the mandate of the technical manager of the fuelling station.
Change to requirement (not in note) and make a list of task and corresponding competence level
required.
4.4 Professionals on parking and garages
The person involved in parking or garages activities has the competence defined in 5.3.
Level 2 or higher of qualification shall be appropriate for this person.
7
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ISO 23684:2023(E)
5 Requirements for figures involved on NGVs use and operation
5.1 Professionals on workshop
5.1.1 Technical manager of workshop facilities (Table 1)
Table 1 — Skills, abilities and knowledge of technical manager of workshop
Technical/professional skills Abilities Knowledge
Technical manager shall be able to Relevant abilities to every skill Relevant knowledge to every skill
1) Plan and manage independently a) To apply procedures to plan — Elements of planning
the activities of installation and manage installation or
— Processes and work cycles for
and/or maintenance and maintenance of NGVs
car repair garage
repair OEM and/or retrofitted
b) To prepare documentation,
NGVs, providing instructions,
— Time and methods
materials, equipment and
directives and information for
tools for the different
the operatives.
— Warehouse management
activities
procedures (stock management,
warehousing and materials
handling)
— Maintenance, diagnostic
procedures and related tools
2) Apply the applicable regulations a) To identify the applicable — Applicable regulations
to the operations including regulations for NGVs
— Health risks for the specific
safety and take decisions operation and working areas
jobs, methods of prevention
accordingly.
b) To check that operators have and protection (especially the
the necessary competence explosion risk)
and knowledge on applicable
— Specific risks for the
regulations, procedures,
environment and prevention and
contractual terms, risks
protection methods
associated with the task to
be performed
— Natural gas characteristics, safe
use and handling
c) To check the prevention and
protection measures for the
— Technical rules concerning
environment and health and
the approval of vehicles,
safety at work
components and systems
d) To assess suitability
— Operating procedures
and conformity of the
components depending on
vehicles approval
e) To interact with the
responsible body for the
control and testing activities
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ISO 23684:2023(E)
TTaabblle 1 e 1 ((ccoonnttiinnueuedd))
Technical/professional skills Abilities Knowledge
Technical manager shall be able to Relevant abilities to every skill Relevant knowledge to every skill
3) Keep to and improve the a) To use the specific — Engine and fuel systems
workshop internal procedures documentation correctly principles, mechanisms and
and instructions in accordance (e.g. manuals, diagrams, working parameters
with technical manual of the drawings, procedures, BoM
— Types and characteristics of
OEM or retrofitted NGVs. and specific instructions for
the main components of fuel
the different activities) both
systems
in electronic and in paper
form
— Diagnostics software and
hardware
b) To identify tools and working
se
...
2022-05-20
2023-02
ISO/TC 22/SC 41
ISO/DIS 23684:2023(E)
Road vehicles — Technical personnel dealing with natural gas vehicles (NGVs) —
Training and qualification
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ISO/PWI 23684.1:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part
of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
mechanical, including photocopying, or posting on the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’s member body in
the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2018 – All rights reserved
ii © ISO 2023 – All rights reserved
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ISO/AWI 23684:2023(E)
Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Figures involved on NGVs use and operations . 6
4.1 General . 6
4.2 Professionals on workshop . 8
4.2.1 Technical manager of workshop . 8
4.2.2 Operators on workshop . 9
4.3 Professionals on CNG, LNG and L-CNG fuelling station . 9
4.3.1 Technical manager of CNG, LNG and L-CNG fuelling station . 9
4.3.2 Operators of CNG, LNG and L-CNG fuelling station . 9
4.4 Professionals on parking and garages . 9
5 Requirements for figures involved on NGVs use and operation . 9
5.1 Professionals on workshop . 9
5.1.1 Technical manager of workshop facilities (Table 1) . 9
5.1.2 Operators on workshop (Table 2) . 11
5.2 Professionals on CNG, LNG and L-CNG fuelling station . 13
5.2.1 Technical manager of CNG, LNG and L-CNG fuelling station . 13
5.2.2 Operators of CNG, LNG and L-CNG fuelling station (Table 4) . 16
5.3 Professional on parking . 17
6 Training . 18
6.1 General . 18
6.2 Training course . 18
6.3 Requirements related to the theoretical-practical professional training courses . 18
6.3.1 Recognized training course . 18
6.3.2 Competence of trainers . 19
6.3.3 Training method . 19
6.3.4 Training bodies . 19
6.3.5 Training location . 19
6.4 General on training for workshop professional . 19
6.4.1 Technical manager of workshop . 19
6.4.2 Main knowledge of the course . 20
6.5 Workshop operator . 20
6.5.1 Main knowledge of the course . 20
6.6 Technical manager of CNG /LNG / L-CNG fuelling station . 21
6.6.1 Training for technical managers of CNG/LNG/L-CNG fuelling stations . 21
6.7 Operator of CNG/LNG/L-CNG fuelling stations . 22
6.7.1 Training for operator of CNG/LNG/L-CNG fuelling stations . 22
7 Competence assessment and qualification achievement . 22
7.1 Final examination . 22
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© ISO 2023 – All rights reserved iii
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ISO/PWI 23684.1:2023(E)
8 Qualification levels . 22
9 Type of qualification . 23
10 Authorized qualification body . 23
Annex A (normative) E-learning and e-learning requirements . 24
Annex B (informative) Topics of the workshop technical manager course . 29
Annex C (informative) Training for technical managers of CNG/LNG/L-CNG fuelling stations . 31
Bibliography . 33
© ISO 2018 – All rights reserved
iv © ISO 2023 – All rights reserved
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ISO/AWI 23684:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described in
the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO
documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC
Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights
identified during the development of the document will be in the Introduction and/or on the ISO list of patent
declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation onof the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT)), see
www.iso.org/iso/foreword.htmlthe following URL: .
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 41, Specific
aspects offor gaseous fuels.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2018 – All rights reserved
© ISO 2023 – All rights reserved v
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ISO/PWI 23684.1:2023(E)
Introduction
Since the effectiveness of any application on natural gas vehicles (NGVs) depends upon the capabilities of the
persons who perform or are responsible, a procedure has been developed to provide a means of evaluating and
documenting the competence of personnel whose duties require the appropriate theoretical and practical
knowledge of the work they perform, specify, supervise, monitor or evaluate.
When certification of personnel working on NGVs is required in product standards, regulations, codes or
specifications, it is important to certify the personnel in accordance with this International Standard.document.
When latitude is provided in the criteria within this International Standarddocument, the certification body has
the final decision in determining specific requirements.
When there is no mandatory requirement in national legislation, or in case a member State does not adopt this
international standarddocument concerning certification of NGv’sNGV’s personnel, the employers of such
personnel shall take the steps to decide how to ensure themselves that employees are competent to do the
work assignment. Thus, they may employ people who are already certified or they may apply their own
expertise and under their responsibility ensure themselves that their employee has the necessary competence.
This document gives particular emphasis on:
— the way in which qualifications are expressed;
— application of the principle that “learning outcomes” are crucial instead of the path to allow transferability
between formal, informal and non-formal areas.
This document is mainly directed to:
— Workshop Personnel
— Vehicle Park Owner / Personnel
— workshop personnel,
— vehicle park owner/personnel,
— NGV Dealer / Ownerdealer/owner,
— CNG, LNG and L-CNG fuelling station Owner / Personnelowner/personnel,
— Firstfirst responders,
— Inspectorsinspectors,
— Trainingtraining course providers,
— Certification Bodies
— Original Equipment Manufacturer (OEM)
— System Manufacturer
— — certification bodies,
— original equipment manufacturer (OEM),
© ISO 2018 – All rights reserved
vi © ISO 2023 – All rights reserved
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ISO/AWI 23684:2023(E)
— system manufacturer,
— workshop owner/operator,
Workshop Owner/Operator
— CNG and L-CNG fuelling station Owner / Operatorowner/operator,
— Parkingparking and garages Owner / Operatorowner/operator.
© ISO 2018 – All rights reserved
© ISO 2023 – All rights reserved vii
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INTERNATIONAL STANDARD ISO 23684:2023(E)
Road vehicles — Technical personnel dealing with natural gas
vehicles (NGVs) — Training and qualification
1 Scope
This document specifies the requirements for the provisions of personnel dealing with the operation on natural
gases (NG) fuelled vehicles in order to demonstrate their competence.
This document specifies the minimum requirements for training and qualification of personnel according to the
level of safety required by the activity.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
3.1
ability
capacity and human attribute to perform an activity
[SourceSOURCE: ISO/IEC TS 17027:2014, 2.1], modified — The phrase "and human attribute" was added.]
3.2
authorized qualification body
body, independent of the NGV workshop, (3.20), authorized by the certification body (3.4) to prepare and
administer qualification (3.24) examinations
Note 1 to entry : qualification: Qualification examination is an activity administered by the certification body (3.4) or the
authorized qualification body, which assesses the general, specific and practical knowledge and the skill (3.3128) of the
candidate.
[SOURCE: ISO 9712:2021, 3.2, modified – ‘employer’— "employer" has been changed to ‘"NGV
workshop’workshop", the word "qualifications" and the Note 1 to entry were added.]
3.3
certification
third party attestation related to products, processes, systems, or persons
[SOURCE: ISO 1700:2004, 5.5; ISO 7240-1:2014(en),, 2.1.16]
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ISO/DIS 23684:20222023(E)
3.4
certification body
third-party conformity assessment body operating certification (3.3) schemes
Note 1 to entry: A certification body can be non-governmental or governmental (with or without regulatory authority).
Note 2 to entry :: A conformity assessment body it is a body that performs conformity assessment activities and that can be
the object of accreditation.
Note 3 to entry :: A third-parthyparty conformity assessment: it is the conformity assessment activity that is performed by
a person or body that is independent of the person or organization that provides the object, and of user interests in that
object
[SOURCE: ISO/IEC 17065:2012(en), 3.12], 3.12, modified — Notes 2 and 3 to entry were added.]
3.5
competence
ability (3.1) to apply knowledge and skills (3.3128) to achieve intended results
[SOURCE: ISO/IEC 17024:2012, 3.6]
3.6
competence assessment
formal outcome of an evaluation process (e.g. examination) and validation by means of objective elements,
obtained when a competent body (3.7) states that the learning outcomes of a person meet given standards and
safety regulations
3.7
competent body
person or corporate body, defined by the national or relevant authority, which by combination of appropriate
qualification, (3.24), training, (3.32), experience and resources is able to make objective judgments on a subject
[SOURCE: EN 13423 SOURCE: ISO 10691:2004, 3.2]
3.8
competent person
person who has acquired, through training, (3.32), qualification, (3.24), experience or a combination of these,
the knowledge and skill (3.31) 28) enabling that person to correctly perform the required tasks
[SOURCE: ISO 11525-1:2020(en),, 3.4]
3.9
CNG
compressed natural gas
CNG)
natural gas (3.18) which has been compressed and stored for use as a vehicle fuel
[SOURCE: ISO 16923:2018 terminology alignment15500-1:2015, 3.2]
3.10
CNG cylinder
any container used for the storage of compressed natural gas (CNG) (3.9) according to the following
classifications:
2 © ISO 20222023 – All rights reserved
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ISO/DIS 23684:20222023(E)
— CNG-1: an all metal cylinder
— CNG-2: a hoop wrapped cylinder with a load-sharing metal liner and composite reinforcement on the
cylindrical part only
— CNG-3: a fully wrapped cylinder with a load-sharing metal liner and composite reinforcement on both the
cylindrical part and dome ends
— CNG-4: a fully wrapped cylinder with a non-load sharing non-metallic liner and composite reinforcement
on both the cylindrical part and dome ends
3.11
garage
building used for the storage and servicing of NGVs
3.12
formal training
organized and documented program of learning activities designed to impart the knowledge and skills (3.3128)
necessary to be qualified to this document
3.13
fuelling station
facility at which vehicle fuels are dispensed
3.14
learning outcome
what a person is expected to know, understand or be able to do at the end of a training programme, course or
module
[SOURCE: EN 13423 SOURCE: ISO/IEC TS 17027:2014, 2.57]
3.15
LiquefiedLNG
liquefied natural gas
LNG
natural gas (3.18) which has been liquefied, after processing, for storage or transportation purposes
[SOURCE: EN ISO and 16924:2018 terminology alignment2016, 3.38]
3.16
L-CNG fuelling station
facility at which compressed natural gas (CNG) (3.9) derived from liquefied natural gas (LNG) (3.15) is
dispensed to vehicles
3.17
LNG fuelling station
facility at which liquefied natural gas (3.15) is dispensed to vehicles
3.18
natural gas
NG
complex gaseous mixture of hydrocarbons primarily methane, but which generally includes ethane, propane
and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon dioxide
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ISO/DIS 23684:20222023(E)
Note 1 to entry: theThe definition includes renewable natural gas (biogas, biomethane, etc).).
[SOURCE: ISO 14532:2014, 2.1.1.1, ]modified — Note 1 to entry was replaced.]
3.19
Naturalnatural gas vehicle
NGV
road vehicle that is powered, either fully or partially, by natural gas (3.18) stored on board vehicle in liquid
or/and gaseous form
3.20
NGV workshop
competent Organizationorganization, appropriately equipped, that assumes technical responsibility for correct
and safe service, inspection, repair and retrofit on compressed natural gas (CNG) (3.9) or liquefied natural gas
(LNG) (3.15) vehicles
3.21
Notified Body
notified body
independent, accredited body which is entitled by an authorized accrediting body
Note 1 to entry: Upon definition of standards and regulations, the accrediting body may allow a notified body to provide
verification and certification (3.3) services. These services are meant to ensure and assess compliance to the previously
defined standards and regulations, but also to provide an official certification (3.3) mark or a declaration of conformity.
3.22
operator
person working in aan NGV workshop (3.20) or in a compressed natural gas (CNG) (3.9) /LNG/L-CNG fuelling
station (3.16) under the supervision of the competent person (3.98)
3.23
practical examination
assessment of practical skills (3.3128), in which the candidate demonstrates familiarity with, and the ability
(3.1) to perform, the test
3.24
qualification
demonstrated education, training, (3.32), and work experience, where applicable, required to properly perform
the assigned task as awarded or conferred as described in the document.
[SOURCE: adaptedNote 1 to entry: Adapted from ISO/IEC 17024:2012, 3.7; ISO 29992:2018, 3.1, and
ISO/IEC 19479:2019].
3.25
qualification level
Level 1: The learning outcomes relevant to Level 1 are basic general knowledge
Level 2: The learning outcomes relevant to Level 2 are • basic factual knowledge of a field of work or study
Level 3: The learning outcomes relevant to Level 3 are • knowledge of facts, principles, processes and general
concepts, in a field of work or study
Level 4: The learning outcomes relevant to Level 4 are • factual and theoretical knowledge in broad contexts
within a field of work or study
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ISO/DIS 23684:20222023(E)
Level 5: The learning outcomes relevant to Level 5 are • comprehensive, specialized, factual and theoretical
knowledge within a field of work or study and an awareness of the boundaries of that knowledge
Level 1: the learning outcomes relevant to Level 1 are basic general knowledge
Level 2: the learning outcomes relevant to Level 2 are basic factual knowledge of a field of work or study
Level 3: the learning outcomes relevant to Level 3 are knowledge of facts, principles, processes and general concepts, in
a field of work or study
Level 4: the learning outcomes relevant to Level 4 are factual and theoretical knowledge in broad contexts within a field
of work or study
Level 5: the learning outcomes relevant to Level 5 are comprehensive, specialized, factual and theoretical knowledge
within a field of work or study and an awareness of the boundaries of that knowledge
3.26
qualified person
EN 13423 individual subjected to qualification process which has passed the qualification (3.24)
3.27
Recognizedrecognized training course
training course which contents (for instance: qualification (3.24) of teachers, training procedures, documents,
examination program and procedures) are assessed against applicable standards and approved by a
certification body (3.4)
3.28
skill
ability (3.1) to perform a task or activity with a specific intended outcome acquired through education, training,
(3.32), experience or other means
[SOURCE: ISO/IEC/TS 17027:2014, 2.74]; ISO 29992:2018(en), 3.11]
3.29
skilled organization
entity comprising multiple people, such as an institution or an association, that has a collective goal and is
linked to an external environment and shall be recognized by National Authorities for the specific field of
application
3.30
system manufacturer
company which can assume technical responsibility for the manufacturing or retrofitting of NGV fuel system
and can demonstrate that it possesses the features required and the necessary means to provide quality
assessment and conformity of production of the NGV fuel system
[SOURCE: R. 115]
[SOURCE: Reference [14], 2.3, modified — "LPG and CNG" have been replaced by "NGV fuel system".]
3.31
technical manager
qualified person which(3.26) that takes responsibility for decisions relating to parking, fuelling, installation,
maintenance and repair of an NGV system
Note 1 to entry: See also EN 13423.
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ISO/DIS 23684:20222023(E)
3.32
training
activities designed to facilitate the learning and development of knowledge, skills (3.31), and abilities, and to
improve the performance of specific tasks or roles
[SOURCE: ISO 22398:2013, 3.23]
3.33
training course provider
organization competent to provide training (3.3632) by specific courses to personpersons carrying out
operations or activities on an NGV
3.34
LNG tank
any storage system used for liquefied natural gas (LNG) (3.15)
4 Figures involved on NGVs use and operations
4.1 General
Figures operating on NGVs, as per subject of this document, shall be differentiated by their own
responsibilities.
This shall be defined by the following areas of relevance:
— Workshopworkshop;
— CNG, LNG and L-CNG fuelling station;
— Parkingparking and Garagegarage.
In figure XX itFigure 1 is an example of how this standarddocument applies.
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ISO/DIS 23684:20222023(E)
PARTIES & ACTIVIETIES FOR
FIELD OF ACTIVITY PROFESSIONAL FIGURES MINIMUM QUALIFICATION LEVEL
PERSONNEL QUALIFICATION
TRAINING COURSE
PROVIDER
TECHNICAL
QUALIFICATION REQUIRED
PARKING & DEPOT
MANAGER TRAINING COURSE
RECOGNITION BY A
CERTIFICATION BODY
RECOGNISED TRAINING
COURSE
TECHNICAL
MANAGER
TRAINING FINAL EXAMINATION
FUELLING STATION
OPERATOR QUALIFICATION REQUIRED
WRITTEN QUALIFICATION STATEMENT
TECHNICAL QUALIFICATION LEVEL
MANAGER
3 OR 4
WORKSHOP
OPERATOR
CERTIFICATION BODY EXAM
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ISO/DIS 23684:20222023(E)
Figure 1 — Application of this document
4.14.2 Professionals on workshop
Different qualification levels are defined as follows:
— Technicaltechnical manager;
— Operatoroperator.
4.1.14.2.1 Technical manager of workshop
TechnicalThe technical manager is a competent person who has a high level of skill, knowledge and abilities in
installing and maintaining an NGV system, as defined in 5.1.1. The technical manager is responsible for the
declaration of conformity provided for the activities performed or supervised on NGVs.
HeThe technical manager has technical autonomy and he'she or she is able to perform himselfindependently on
or to supervise and coordinate any operation on NGVs.
Level 4 or higher of qualification shall be appropriate for this person.
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ISO/DIS 23684:20222023(E)
4.1.24.2.2 Operators on workshop
Operators have a basic level knowledge of vehicles, their main components and NGVs, as defined in 5.1.2.
They act (partially independent) to perform the installation or maintenance work under technical manager
supervision.
Level 2 or higher of qualification shall be appropriate for this person.
4.24.3 Professionals on CNG, LNG and L-CNG fuelling station
Different qualification levels are defined as follow:
— technical manager;
— operator.
Technical manager
— Operator
4.2.34.3.1 Technical Manager of CNG, LNG and L-CNG fuelling station
TechnicalThe technical manager is a competent person who has a high level of skill, knowledge and abilities to
provide proper and safe fuelling of NGVs, as defined in 5.2.1.
HeThe technical manager has technical autonomy and he'she or she is able to perform himselfindependently on
or to supervise and coordinate the fuelling operations.
Level 3 or higher of qualification shall be appropriate for this person.
4.2.44.3.2 Operators of CNG, LNG and L-CNG fuelling station
Operators have a basic level knowledge about fuelling operation of NGVs, as defined in 5.2.2.
They act (partially independent) under the mandate of the technical manager of the fuelling station.
Change to requirement (not in note) and make a list of task and corresponding competence level required. See
comment resolution from Verona meeting.
4.34.4 Professionals on parking and garages
The person involved in parking or garages activities has the competence defined in 5.3.
Level 2 or higher of qualification shall be appropriate for this person.
5 Requirements for figures involved on NGVs use and operation
5.1 Professionals on workshop
5.1.1 Technical manager of workshop facilities (Table 1)
Table 1 — Skills, abilities and knowledge of technical manager of workshop
TtechnicalTechnical/professional
Abilities Knowledge
skills
Technical Managermanager shall relevantRelevant abilities to relevantRelevant knowledge to
be able to every skill every skill
1) Plan and manage independently a) To apply procedures to plan — elementsElements of planning
the activities of installation and manage installation or
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ISO/DIS 23684:20222023(E)
and/or maintenance and repair maintenance of NGVs — processesProcesses and work
OEM and/or retrofitted NGVs, cycles for car repair garage
providing instructions, b) To prepare documentation,
directives and information for materials, equipment and — timeTime and methods
the operatives. tools for the different
activities — warehouseWarehouse
management procedures (stock
management, warehousing and
materials handling)
— maintenanceMaintenance,
diagnostic procedures and
related tools
2) Apply the applicable regulations a) To identify the applicable — Applicable regulations
to the operations including regulations for NGVs
safety and take decisions operation and working areas — Health risks for the specific jobs,
accordingly. methods of prevention and
b) To ch
...
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