UN R34 Supplement 1 (04 series) · UNECE Regulation No. 34 (ECE R34) — Uniform provisions concerning the approval of vehicles with regard to the prevention of fire risks.

UN R34 — Supplement 1 to the 04 series of amendments

Base text → Supplement 1

Adopted at the WP.29 199th sessionEntry into force not yet known

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What changed: No special provisions or exemptions apply to vehicles with an ADS in any driving mode (new para. 0.1.2.).
The term “Occupant compartment” replaces “Passenger compartment” (para. 4.3.), and paragraphs 5.5. to 5.7. now refer to “any occupant compartment”.
The filler hole must not be in the loading area (para. 5.8.).
Why: Supplement 1 is introduced to take into account vehicles of categories X and Y, and ADS vehicles with a manual mode above 6 km/h.
The amendment intends to extend the Regulation to vehicles without a driver and without manual driving controls.
The change to paragraph 5.8. aims to clarify that the loading area must be considered as luggage compartment for vehicles of category N.

Q1What changed11 changes

New introduction for categories X and Y and vehicles with an ADS (paras. 0. to 0.1.2.)

New paragraph 0.1. says that Supplement 1 is introduced to take into account vehicles of categories X and Y. Paragraph 0.1. also names vehicles with an ADS and a manual mode for speeds above 6 km/h. Paragraph 0.1.1. says that the Regulation was first written for vehicles with a driver and manual driving controls. Without driver manual driving controls in the vehicle, related provisions must not be taken into account if this amendment does not already cover them. New paragraph 0.1.2. says that no special provisions or exemptions apply to vehicles with an ADS in any driving mode.

Introduction

Supplement 1 to the 04 series of amendments is introduced to take into account vehicles of categories X and Y, as well as vehicles with a manual mode operating at speeds above 6 km/h which are equipped with an ADS.

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“Occupant compartment” in place of “Passenger compartment” (para. 4.3.)

Paragraph 4.3. now defines the term “Occupant compartment”. Before this supplement, the defined term was “Passenger compartment”. The rest of the definition does not change.

"Passenger Occupant compartment" means the space for occupant accommodation bounded by the roof, floor, side walls, doors, outside glazing, front bulkhead, and the plane of the rear compartment bulkhead or the plane of the rear seat back support;

Fuel tanks and occupant compartments (paras. 5.5. to 5.7.)

Paragraph 5.5. now refers to “any occupant compartment” in place of “the passenger compartment”. In the first sentence of paragraph 5.6., “the occupant compartment” becomes “the occupant compartment (if fitted)”. In the second sentence of paragraph 5.6. and in paragraph 5.7., “the occupant compartment” becomes “any occupant compartment”. Annex VI of document ECE/TRANS/WP.29/1192 amended paragraphs 5.5. to 5.7. to say “any occupant compartment”.

The tank(s) shall not be situated in, or from, a surface (floor, wall, bulkhead) of the passenger any occupant compartment or other compartment integral with it.

A partition shall be provided to separate the occupant compartment (if fitted) from the tank(s). The partition may contain apertures (e.g. to accommodate cables) provided they are so arranged that fuel cannot flow freely from the tank(s) into the any occupant compartment or other compartment integral with it during normal conditions of use.

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Filler hole and the loading area (para. 5.8.)

The filler hole must not be in the loading area. As before, it must not be in the occupant compartment, the luggage compartment or the engine compartment.

The filler hole shall not be situated in the occupant compartment, in the luggage compartment , in the loading area or in the engine compartment.

Footnotes 1 and 2 on the Consolidated Resolution (R.E.3)

Footnote 1 now refers to document ECE/TRANS/WP.29/78/Rev.8 and gives a web link. Before, it referred to document ECE/TRANS/WP.29/78/Rev.2, para. 2. Footnote 2 now refers to Annex 3 of document ECE/TRANS/WP.29/78/Rev.8 and gives a web link. Before, it referred to document TRANS/WP.29/78/Rev.2/Amend.1. The words “distinguish numbers” change to “distinguishing numbers”.

As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.2, para. 2. ECE/TRANS/WP.29/78/Rev.8 - https://unece.org/transport/vehicle-regulations/wp29/resolutions

The distinguish distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document TRANS/WP.29/78/Rev.2/Amend.1. ECE/TRANS/WP.29/78/Rev.8 , Annex 3 - https://unece.org/transport/transport/vehicle-regulations/wp29/resolutions

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Q2Why it changed

Proposed by: Expert from the Kingdom of the Netherlands, on behalf of the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS)
Working party: GRSG, 130th session (October 2025)

Reasons

Supplement 1 is introduced to take into account vehicles of categories X and Y. It is also introduced for vehicles with an ADS and a manual mode for speeds above 6 km/h.
Source
“is introduced to take into account vehicles of categories X and Y, as well as vehicles with a manual mode operating at speeds above 6 km/h which are equipped with an ADS”
ECE/TRANS/WP.29/2026/103new paragraph 0.1.
The amendment intends to keep the spirit of the Regulation. It also intends to extend the Regulation to vehicles without a driver and without manual driving controls.
Source
“It is the intention of this amendment to keep the spirit of the Regulation and to extend its application to vehicles without driver and without manual driving controls in the vehicle”
ECE/TRANS/WP.29/2026/103new paragraph 0.1.1.
The change to paragraph 4.3. aims to clarify the provisions for vehicles with a separate driver compartment.
Source
“In paragraph 4.3., the amendment aims to clarify the provisions for vehicles in case of separate driver compartment”
ECE/TRANS/WP.29/GRSG/2025/16II. Justification, para. 2
The change to paragraph 5.8. aims to clarify that the loading area must be considered as luggage compartment for vehicles of category N.
Source
“In paragraph 5.8., the amendment aims to clarify that the loading area shall be considered as luggage compartment for vehicles of category N”
ECE/TRANS/WP.29/GRSG/2025/16II. Justification, para. 3
GRSG adopted this proposal as one of the task force proposals that update UN Regulations. These proposals follow the common recommendations of the task force work with the subsidiary bodies of WP.29.
Sources (2)
“introduced proposals of amendments updating the regulations (ECE/TRANS/WP.29/GRSG/2025/14 to 46) according to the common recommendations of the coordinated task force activities with the subsidiary bodies of WP.29”
ECE/TRANS/WP.29/GRSG/109para. 34
“GRSG-130-44-Rev.1, replacing ECE/TRANS/WP.29/GRSG/2025/16, as Proposal for supplement 1 to the 04 Series of Amendments to UN Regulation No. 34”
ECE/TRANS/WP.29/GRSG/109para. 34

Document trail

2025-07ProposalECE/TRANS/WP.29/GRSG/2025/16Proposal by the expert from OICA on behalf of TF-AVRS
—RevisedGRSG-130-44-Rev.1Revised TF-AVRS proposal that replaced ECE/TRANS/WP.29/GRSG/2025/16
—Working party adoptsECE/TRANS/WP.29/GRSG/109Session report, para. 34
2026-04Sent to WP.29ECE/TRANS/WP.29/2026/103Text that GRSG sent to WP.29 and AC.1
—Amended in sessionWP.29-199-10Editorial modifications, reproduced in Annex VI of ECE/TRANS/WP.29/1192
2026-06-24WP.29 adoptsECE/TRANS/WP.29/1192Adopted at the 199th session (session report, para. 103)
PendingIn forceDate not yet known

Q3Who is affected

Vehicle manufacturer

Make sure that no tank is situated in, or from, a surface of any occupant compartment (para. 5.5.).
Check that, in normal use, leaking fuel goes to the ground and not into any occupant compartment (para. 5.7.).
Make sure that the filler hole is not in the loading area (para. 5.8.).
Use the term “Occupant compartment” in place of “Passenger compartment” in your documents (para. 4.3.).

Component supplier

Make sure that partition apertures do not let fuel flow freely into any occupant compartment in normal use (para. 5.6.).
Make sure that your fuel system design does not put the filler hole in the loading area (para. 5.8.).

Technical service / Approval authority

Check the tank position, the partition and the fuel leak path against any occupant compartment (paras. 5.5. to 5.7.).
Check that the filler hole is not in the loading area (para. 5.8.).
Without driver manual driving controls, check that related provisions not covered by this amendment are not applied (para. 0.1.1.).
Make sure no special provisions or exemptions are applied to vehicles with an ADS in any driving mode (para. 0.1.2.).

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ⓘ This report gives advice only. It is not legal or type-approval advice.

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