WP.29 197th session: amendments to UN Regulations
11–14 November 2025
Amendments to UN Regulations that the WP.29 documents submitted for the vote at the 197th session. Each change report shows what changes, why, and who is affected.
This list has the 42 amendments with a RegVault change report, in 26 regulations. It is not the full agenda of the session.
UN R0 — International Whole Vehicle Type Approval (IWVTA)
- 08 series — Base text
Annex 4 now lists a later series of amendments for UN Regulations Nos. 10, 16, 17, 34, 125, 127 and 138. Annex 4 no longer lists UN Regulation No. 44 for built-in vehicle booster cushions, and now lists No. 129 for built-in “specific vehicle booster seats”.
UN R10 — Electromagnetic compatibility
- 07 series — Supplement 1
In Table 2 of Annexes 4, 5, 7 and 8, the scanning receiver “Step size” of 50 kHz is now a “Maximum step size” of 60 kHz.
- 06 series — Supplement 4
An approval number must now be assigned to each vehicle or ESA type-approved in accordance with Schedule 4 of the Agreement (E/ECE/TRANS/505/Rev.3).
UN R16 — Safety-belts
- 10 series — Supplement 2
A dust test with talcum to the IEC 60529 material specifications is now also satisfactory if the test object meets the requirements of paragraph 7.6.3.1.
- 09 series — Supplement 2
A dust test with talcum to the IEC 60529 material specifications is now also satisfactory if the test object meets the requirements of paragraph 7.6.3.1.
- 08 series — Supplement 6
A dust test with talcum to the IEC 60529 material specifications is now also satisfactory if the test object meets the requirements of paragraph 7.6.3.1.
UN R35 — Foot controls
- 01 series — Supplement 1
Footnote 1 of Annex 3 now refers to Addendum 6 of Mutual Resolution No. 1 (M.R.1) for the “H” point procedure.
UN R46 — Devices for indirect vision
- 07 series — Base text
New paragraphs 16.3. to 16.3.4. give installation requirements for surveillance camera-monitor-recording devices.
UN R48 — Installation of lighting and light-signalling devices
- 09 series — Supplement 2
New paragraph 6.28. adds the optional reversing projection. This is a light signal projected on the ground by reversing projectors to give other road users enhanced recognition of reversing indication.
- 08 series — Supplement 7
New paragraph 6.27. adds the optional reversing projection. This is a light signal projected on the ground by reversing projectors to give other road users enhanced recognition of reversing indication.
- 07 series — Supplement 9
New paragraph 6.27. adds the optional reversing projection. This is a light signal projected on the ground by reversing projectors to give other road users enhanced recognition of reversing indication.
- 06 series — Supplement 22
New paragraph 6.27. adds the optional reversing projection. This is a light signal projected on the ground by reversing projectors to give other road users enhanced recognition of reversing indication.
UN R49 — Emissions of C.I. and P.I. (LPG and CNG) engines
- 07 series — Supplement 3
Paragraph 3.5.1. now includes dual-fuel engines of Type 1A with hydrogen as gaseous fuel, and Annexes 8 and 15 add test rules for them.
- 06 series — Supplement 11
Engines mounted in vehicles of up to 2,840 kg reference mass with an approval to Regulation No. 83 do not need approval to this Regulation. The words “as an extension” are deleted.
UN R62 — Anti-theft (mopeds/motorcycles)
- 01 series — Supplement 1
New paragraph 5.13. requires digital keys to comply with new Annex 4, which covers documentation, safe operation, verification and the competence of auditors and assessors.
UN R65 — Special warning lamps
- 00 series — Supplement 13
A special warning lamp device of Category T, HT or X may be approved for the colours blue, amber and red separately.
UN R73 — Lateral protection devices
- 02 series — Base text
The lower edge limit of the LPD drops from 550 mm to 450 mm, except where the distance between adjacent axle centers exceeds 6.5 m.
UN R79 — Steering equipment
- 04 series — Supplement 9
Condition (c) of paragraph 5.6.5. now says which version or series of UN Regulation No. 171 the DCAS must comply with.
- 03 series — Supplement 14
Condition (c) of paragraph 5.6.5. now says which version or series of UN Regulation No. 171 the DCAS must comply with.
UN R83 — Emissions of M1 and N1 vehicles
- 08 series — Supplement 3
References to the UN Regulation on RDE now give its number, 168, instead of “[xxx]” or a similar mark.
- 07 series — Supplement 18
At the manufacturer's request, type approval may now be granted to M1, M2, N1 and N2 vehicles with a reference mass not exceeding 2,840 kg. These vehicles must meet the conditions laid down in this Regulation.
- 06 series — Supplement 21
At the manufacturer's request, type approval may be granted to M1, M2, N1 and N2 vehicles with reference mass ≤ 2,840 kg that meet this Regulation. Before, the text allowed the extension of a type approval to these vehicles.
UN R90 — Replacement braking parts
- 02 series — Supplement 12
Annex 1A has a new item 8.3. for a description of the burnishing procedure used during the type approval tests.
UN R121 — Identification of controls, tell-tales and indicators
- 01 series — Supplement 7
Paragraphs 5.2.1., 5.2.2., 5.2.3., 5.2.6., 5.4.1.1. and 5.4.2. now refer to ISO 2575:2021 instead of ISO 2575:2004.
UN R127 — Pedestrian safety
- 04 series — Supplement 3
Annex 4, paragraph 1.4., replaces “0.0325” by “0.0339” and “0.0467” by “0.0486” in the moments of inertia of the femur and the tibia.
- 03 series — Supplement 4
Annex 4, paragraph 1.4., replaces “0.0325” by “0.0339” and “0.0467” by “0.0486” in the moments of inertia of the femur and the tibia.
- 02 series — Supplement 1
Annex 4, paragraph 1.4., replaces “0.0325” by “0.0339” and “0.0467” by “0.0486” in the moments of inertia of the femur and the tibia.
UN R129 — Enhanced Child Restraint Systems (ECRS)
- 04 series — Supplement 4
Paragraph 2.57. now lists a new use of a module, “as a stand-alone booster seat”, and deletes “Universal” from “stand-alone Integral Universal Belted”.
UN R131 — Advanced emergency braking systems (AEBS)
- 02 series — Supplement 3
Paragraph 6.11.1. allows virtual testing, by request of the vehicle manufacturer, as an alternative for some tests described in paragraphs 6.4. to 6.6.
UN R134 — Hydrogen and Fuel Cell Vehicles (HFCV)
- 03 series — Base text
The CHSS definition now includes supply lines for additional TPRDs (if any). Annex 9 says that these lines must be tested with the container through appropriate adaptors.
- 02 series — Supplement 3
In paragraph 7.1.1.5., the list of fuelling receptacle specifications is now H35, H35MF or H70, instead of H35, H35HF or H70.
UN R148 — Light-Signalling Devices (LSD)
- 01 series — Supplement 5
Reversing projectors are added to the scope of the Regulation, and new paragraph 5.12. gives their requirements.
UN R149 — Road Illumination Devices (RID)
- 01 series — Supplement 6
Paragraph 6.1.1. now also names Annex 8, paragraph 4, in the requirements that road illumination devices must meet to conform to the type approved.
- 00 series — Supplement 10
The text that was paragraph 4.11.1. no longer has its own number, and paragraph 4.11.1.1. is now paragraph 4.11.1.
UN R154 — Worldwide harmonized Light vehicles Test Procedure (WLTP)
- 01 series — Supplement 2
The table of assigned additive deterioration factors now gives values by vehicle category, class and mass, in columns G, D and O.
- 00 series — Supplement 2
Table 3b now gives assigned additive deterioration factors in columns for petrol or LPG, diesel and other fuels.
UN R156 — Software update and software update management system
- 01 series — Base text
Paragraph 7.1.1.3. adds a process to assign a dedicated RXSWIN for every Regulation No. X type approval to which the vehicle manufacturer executes software updates. These updates are to type approval relevant software of the Electronic Control System contributing to the UN Regulation No. X type approval relevant characteristics.
UN R171 — Driver Control Assistance System (DCAS)
- 01 series — Supplement 1
If the manufacturer is to take remedial action addressing DCAS design, the Type Approval Authority must upload the information to DETA. Paragraph 7.2.2.2. now says “without undue delay but no later than 14 days after receipt”.
- 00 series — Supplement 3
Systems that include any feature that performs system-initiated manoeuvres are not permitted to be approved to this Regulation (para. 5.3.7.2.4.).
UN R173 — Installation of safety-belts, restraint systems, child restraint systems, ISOFIX child restraint systems and i-Size child restraint systems
- 01 series — Supplement 1
In the keys of Annex 6, appendix 2, paragraphs 4.1. to 4.6., item 2 now reads “Dashed line marks area where a support leg is allowed to protrude”.
UN R175 — Acceleration control for pedal error (ACPE)
- 00 series — Supplement 1
New paragraph 5.1.4.1. reads: “If ACPE is not ready to perform an intervention 6 seconds after the initiation of the vehicle powertrain, information of this status shall be indicated to the driver. This information shall exist until the system has been successfully initialised.”
UN R176 — Field of vision assistant
- 00 series — Supplement 1
A new last sentence in paragraph 5.1.6. says that this provision does not apply after a vehicle electric circuit disconnection, for example for reset.