ISO 17573-3:2024/Amd 1

• Status: Not Published
• ICS: 03.220.20 - Road transport
• ICS: 35.240.60 - IT applications in transport
• Technical Committee: ISO/TC 204 - Intelligent transport systems
• Drafting Committee: ISO/TC 204/WG 5 - Fee and toll collection
• Current Stage: 6000 - International Standard under publication
• Start Date: 27-Oct-2026
• Completion Date: 31-Oct-2026

• Consolidates: EN ISO 17573-3:2024/FprA1:2026 - Electronic fee collection - System architecture for vehicle-related tolling - Part 3: Data dictionary - Amendment 1 (ISO 17573-3:2024/FDAmd1:2026)
• Effective Date: 12-Feb-2026
• Amends: ISO 17573-3:2024 - Electronic fee collection — System architecture for vehicle-related tolling — Part 3: Data dictionary
• Effective Date: 07-Jun-2025

ISO 17573-3:2024/Amd 1 is an ISO amendment to the data dictionary for electronic fee collection (EFC) system architecture for vehicle-related tolling. It updates the data elements used by tolling system designers, implementers, and operators to code licence plates, engine types, vehicle classes, tariff classes, and the ASN.1 definitions behind the EFC common data objects.

What does ISO 17573-3:2024/Amd 1 specify?

ISO 17573-3:2024/Amd 1 specifies targeted changes to Part 3 of the EFC system architecture for vehicle-related tolling. It adds new data values, revises one vehicle-class definition, relocates one data type in the document structure, and replaces Annex A with an updated machine-readable definition set.

The amendment is organized around the following parts of the document:

• Clause 5.2.3, Alphabetindicator
• Clause 5.2.21, EngineCharacteristics
• Clause 5.2.57, TariffClassDescription and VehicleClass
• Clause 5.3.26, deleted and moved into clause 5.6
• Clause 5.6, Complex data types
• Annex A, EFC common data type definitions

In practice, this means the amendment is focused on the data dictionary itself, not on the broader tolling system architecture.

What are the key requirements of ISO 17573-3:2024/Amd 1?

ISO 17573-3:2024/Amd 1 changes the coded vocabularies used in EFC data exchange and the way tariff class information is structured. The most important effect is that implementers must update their data models, validators, and ASN.1 references to match the revised definitions.

Alphabetindicator gains a Japanese licence plate code

Clause 5.2.3 adds japanStructuredLpn, which identifies a structured Japanese licence plate number in the licencePlateNumber data element. This matters for systems that have to accept and interpret vehicle identifiers from Japanese registrations without forcing them into a generic plate format.

EngineCharacteristics is expanded for hybrid and dual-fuel vehicles

Clause 5.2.21 adds several new engine characteristic values covering dual-fuel, hybrid, combined, bivalent, compressed natural gas, liquefied petroleum gas, ethanol blends, external battery plug-in hybrids, non-plug-in hybrids, and serial hybrid range-extender cases. This broadens the vehicle powertrain vocabulary used in tolling records, so systems can classify vehicles more accurately when tariffs depend on engine type or environmental category.

VehicleClass is updated for tariffing use in Europe

Clause 5.2.57 updates VehicleClass so that it combines trailer presence, a UNECE vehicle class group, and a local vehicle class. The document says that, in Europe, the data type uses a binary pattern with separate meaning for these fields, and the local vehicle class follows the local toll scheme. For implementers, this means the tariff logic must preserve both the standardized vehicle group and any scheme-specific local coding.

TariffClassDescription is moved and redefined as an ordered list

Clause 5.3.26 is deleted, and the unchanged content is moved to clause 5.6 as a new TariffClassDescription entry. The revised description defines TariffClassDescription as an ordered list of five optional components: tariffClassId, localVehicleClassId, timeClassId, locationClassId, and userClassId. This matters because tariff classification now has a clearer complex-data structure that software can parse consistently.

tariffClassId has a default when not set

In the moved TariffClassDescription, the first component has a default value when it is not specified. That is important for system integration because a missing value still resolves to a valid tariff-class identifier in the data model.

Annex A is replaced with ASN.1-based definitions and verification data

Annex A is replaced with an updated description of the EFC common data objects using Abstract Syntax Notation One (ASN.1). The annex also identifies the ASN.1 module and provides a SHA-256 hash for verifying the referenced file. This gives implementers a precise machine-readable reference and a way to check file integrity.

What terms does ISO 17573-3:2024/Amd 1 define?

• Electronic fee collection (EFC) - The tolling domain covered by the standard, where vehicle-related charges are represented as structured data.
• Abstract Syntax Notation One (ASN.1) - The notation used in Annex A to define the EFC common data objects.
• Object Identifier - The unique identifier used to name the ASN.1 module version referenced by Annex A.
• SHA-256 - The hash algorithm used to verify the integrity of the referenced ASN.1 file.
• VehicleClass - A data type for vehicle-related tariff information that combines trailer presence, UNECE vehicle class, and local vehicle class.
• TariffClassDescription - A complex data type that groups tariff class, local vehicle class, time class, location class, and user class information.
• UNECE vehicle class - The vehicle grouping used inside VehicleClass for standardized classification of vehicle types.

Who uses ISO 17573-3:2024/Amd 1?

ISO 17573-3:2024/Amd 1 is used by EFC system architects, toll scheme designers, software developers, and data model maintainers. It is also relevant to toll operators, integrators, and testing or conformance teams that need to encode or validate vehicle, engine, and tariff data in a consistent way.

In practice, they use it to update message schemas, map vehicle categories to tariff rules, and keep ASN.1-based implementations aligned with the current EFC data dictionary.

What changed in ISO 17573-3:2024/Amd 1 from the previous edition?

ISO 17573-3:2024/Amd 1 adds a Japanese structured licence plate code, expands EngineCharacteristics with new dual-fuel and hybrid values, updates the VehicleClass semantics, deletes clause 5.3.26 and moves TariffClassDescription into clause 5.6, and replaces Annex A with an updated ASN.1-based definition set and file integrity reference.

Which standards are used with ISO 17573-3:2024/Amd 1?

• ISO/IEC 8824-1 - Specifies the ASN.1 technique used to define the EFC common data objects in Annex A.
• NIST 180-4 - Specifies the SHA-256 algorithm used for the Annex A file integrity check.

What does the ISO 17573-3:2024/Amd 1 document contain?

ISO 17573-3:2024/Amd 1 contains inserted text for Alphabetindicator and EngineCharacteristics, a revised VehicleClass table, and a relocated TariffClassDescription definition. It also replaces Annex A with an ASN.1 module reference, an object identifier, and a SHA-256 digest for verifying the referenced file.

The amendment is mainly a maintenance document for the EFC data dictionary. It gives implementers the exact data values and structural changes they need for software updates, interface mapping, and validation of tolling data exchange.

FINAL DRAFT
Amendment
ISO 17573-3:2024/
FDAM 1
ISO/TC 204
Electronic fee collection — System
Secretariat: ANSI
architecture for vehicle-related
Voting begins on:
tolling —
2026-08-31
Part 3:
Voting terminates on:
2026-10-26
Data dictionary
AMENDMENT 1
Perception de télépéage — Architecture de systèmes pour le
péage lié aux véhicules —
Partie 3: Dictionnaire de données
AMENDEMENT 1
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO 17573-3:2024/FDAM 1:2026(en) © ISO 2026

FINAL DRAFT
ISO 17573-3:2024/FDAM 1:2026(en)
Amendment
ISO 17573-3:2024/
FDAM 1
ISO/TC 204
Electronic fee collection — System
Secretariat: ANSI
architecture for vehicle-related
Voting begins on:
tolling —
Part 3:
Voting terminates on:
Data dictionary
AMENDMENT 1
Perception de télépéage — Architecture de systèmes pour le
péage lié aux véhicules —
Partie 3: Dictionnaire de données
AMENDEMENT 1
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO 17573-3:2024/FDAM 1:2026(en) © ISO 2026

ii
ISO 17573-3:2024/FDAM 1:2026(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 204, Intelligent transport systems.
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.

iii
ISO 17573-3:2024/FDAM 1:2026(en)
Electronic fee collection — System architecture for vehicle-
related tolling —
Part 3:
Data dictionary
AMENDMENT 1
5.2.3
Below Table 3, add the following text between the penultimate and last items in the list:

— japanStructuredLpn, indicating a structured Japanese licence plate number in the data element
licencePlateNumber;
5.2.21
Below Table 21, add the following text between the penultimate and last items in the list:

— dualFuelDieselLpg, indicating dual operating with diesel and liquefied petroleum gas;
— dualFuelPetrolEthanolCng, indicating dual operating with petrol ethanol (see definitio
...

ISO 17573-3:2024/FDAMFDAmd 1:2026(en)
ISO/TC 204
Secretariat: ANSI
Date: 2026-07-13xx
Second edition
AMENDMENT 1
Electronic fee collection — System architecture for vehicle-related
tolling —
Part 3:
Data dictionary
AMENDMENT 1
Perception de télépéage — Architecture de systèmes pour le péage lié aux véhicules —
Partie 3: Dictionnaire de données
AMENDEMENT 1
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FDIS stage
ISO 17573-3:2024/FDAmd 1(en)
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
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
iii
ISO 17573-3:2024/FDAmd 1(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 204, Intelligent transport systems.
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.
iv
ISO 17573-3:2024/FDAmd 1(en)
Electronic fee collection — System architecture for vehicle-related
tolling — Part 3: Data dictionary
AMENDEMENT 1
Part 3:
Data dictionary
AMENDMENT 1
5.2.3, Alphabetindicator
Below Table 3, add the following text between the penultimate and last items in the list:

— — japanStructuredLpn, indicating a structured Japanese licence plate number in the data element
licencePlateNumber;
5.2.21, EngineCharacteristics
Below Table 21, add the following text between the penultimate and last items in the list:

— — dualFuelDieselLpg, indicating dual operating with diesel and liquefied petroleum gas;
— — dualFuelPetrolEthanolCng, indicating dual operating with petrol ethanol (see definition for
code petrolEthanol) and compress natural gas;
— — dualFuelPetrolEthanolLpg, indicating dual operating with petrol ethanol (see definition for
code petrolEthanol) and liquefied petroleum gas;
— — hybridPetrolEthanolExternalBattery, indicating hybrid drive with petrol ethanol (see
definition for code petrolEthanol) and electric engine with external chargeable battery (plug-in
hybrid);
— — combinedPetrolEthanolElectricEngine, indicating hybrid drive with petrol ethanol (see
definition for code petrolEthanol) and electric engine (non-plug-in hybrid);
— — hybridBivalentDieselCngExternalBattery, indicating hybrid drive with bivalent operating
engine with diesel and compressed natural gas, and electric engine with external chargeable battery (plug-
in hybrid);
— — combinedBivalentDieselCngElectricEngine, indicating hybrid drive with bivalent
operating engine with diesel and compressed natural gas, and electric engine (non-plug-in hybrid);
ISO
...