WP.29 198th session: amendments to UN Regulations
10–13 March 2026
Amendments to UN Regulations that the WP.29 documents submitted for the vote at the 198th session. Each change report shows what changes, why, and who is affected.
This list has the 29 amendments with a RegVault change report, in 17 regulations. It is not the full agenda of the session.
UN R10 — Electromagnetic compatibility
- 07 series — Supplement 2
The starting profile of ISO 16750-2 now replaces test pulse 4 of ISO 7637-2:2004 in ESA immunity tests.
UN R13 — Heavy vehicle braking
- 15 series — Supplement 2
New paragraph 5.2.2.26. sets requirements for the dynamo function of e-axle trailers, such as a 22 kW retardation power limit for O3 and O4 trailers.
- 14 series — Supplement 3
This supplement adds definitions for e-axles, e-axle trailers and the dynamo function, and special requirements for the dynamo function of e-axle trailers.
- 13 series — Supplement 6
The parking braking system may now use a park lock device for the static parking brake requirements, with new rules in paragraphs 5.1.4.5.3. and 5.2.1.26.6.
- 12 series — Supplement 8
New paragraph 5.2.2.26. sets requirements for the dynamo function of e-axle trailers, such as a 22 kW retardation power limit for O3 and O4 trailers.
UN R13H — Braking of passenger cars
- 02 series — Supplement 1
The parking braking system may now use a park lock device for the static parking brake requirements, with new rules in paragraphs 5.1.4.3.3. and 5.2.19.5.
- 01 series — Supplement 6
The parking braking system may now use a park lock device for the static parking brake requirements, with new rules in paragraphs 5.1.4.3.3. and 5.2.19.5.
UN R39 — Speedometer and odometer
- 02 series — Supplement 1
Legibility by day and night is not required for a speedometer in a Field of Vision Assistant (FVA) compliant with Regulation No. 125 or 176.
UN R40 — Emission of gaseous pollutants by motor cycles
- 02 series — Base text
Table 5 sets new Type I limits in mg/km for CO, THC (HC) and NOx for each vehicle class.
UN R41 — Noise emissions of motorcycles
- 06 series — Supplement 1
For conformity of production tests under paragraph 8.4., the gear determined during type approval now prevails.
- 05 series — Supplement 5
For conformity of production tests under paragraph 8.4., the gear determined during type approval now prevails.
- 04 series — Supplement 13
For conformity of production tests under paragraph 8.4., the gear determined during type approval now prevails.
UN R48 — Installation of lighting and light-signalling devices
- 09 series — Supplement 3
Paragraphs 5.27.1. and 5.27.2. now also do not apply to devices which include only light source(s) approved according to UN Regulation No. 128 (para. 5.27.3.).
- 08 series — Supplement 8
Paragraphs 5.27.1. and 5.27.2. now also do not apply to devices which include only light source(s) approved according to UN Regulation No. 128 (para. 5.27.3.).
- 07 series — Supplement 10
Paragraphs 5.27.1. and 5.27.2. now also do not apply to devices which include only light source(s) approved according to UN Regulation No. 128 (para. 5.27.3.).
- 06 series — Supplement 23
Paragraphs 5.27.1. and 5.27.2. now also do not apply to devices which include only light source(s) approved according to UN Regulation No. 128 (para. 5.27.3.).
UN R49 — Emissions of C.I. and P.I. (LPG and CNG) engines
- 07 series — Supplement 3, Corrigendum 1
Paragraphs 10.1.8a. and 10.1.10a. no longer list the OBFCM entries given in litres, l or l/h.
UN R79 — Steering equipment
- 04 series — Supplement 10
In remote-control parking, a direct influence on the vehicle speed through the remote-control device or by driver movement must only reduce the speed. Before this supplement, such a direct influence on the value of acceleration and deceleration was not possible.
- 03 series — Supplement 15
In remote-control parking, a direct influence on the vehicle speed through the remote-control device or by driver movement must only reduce the speed. Before this supplement, such a direct influence on the value of acceleration and deceleration was not possible.
UN R83 — Emissions of M1 and N1 vehicles
- 09 series — Base text
This Regulation now applies to vehicles of categories M1 and N1. Annexes 7 and 9, which were “Reserved”, now cover manipulation devices and manipulation strategies, and anti-tampering, security and cybersecurity.
UN R107 — General construction of buses and coaches
- 11 series — Supplement 1
Paragraph 7.19. of Annex 3 now says “intelligible from any passenger seat” instead of “intelligible by any passenger”.
- 10 series — Supplement 1
Paragraph 7.19. of Annex 3 now says “intelligible from any passenger seat” instead of “intelligible by any passenger”.
UN R130 — Lane departure warning system (LDWS)
- 01 series — Supplement 1
If a vehicle is equipped with a means to deactivate the LDWS function, the function must be automatically reinstated at each initiation of the powertrain.
- 00 series — Supplement 2
If a vehicle is equipped with a means to deactivate the LDWS function, the function must be automatically reinstated at each initiation of the powertrain.
UN R140 — Electronic Stability Control (ESC)
- 00 series — Supplement 7
Paragraphs 7.4.1.2., 7.4.1.4. and 7.5.1. now refer to the initiation of the powertrain instead of the ignition locking system position or the ignition cycle.
UN R148 — Light-Signalling Devices (LSD)
- 01 series — Supplement 6
Former paragraphs 3.3.3. and 3.3.3.1. and Figure II on the Unique Identifier (UI) are deleted. Former paragraph 3.3.3.1. said that the approval marking as defined in paragraph 3.3.2. may be replaced by the Unique Identifier, if available.
UN R149 — Road Illumination Devices (RID)
- 01 series — Supplement 7
Former paragraphs 3.3.3. and 3.3.3.1. and Figure I on the Unique Identifier (UI) are deleted. Former paragraph 3.3.3.1. said that the approval marking may be replaced by the Unique Identifier, if available.
UN R168 — Global Real Driving Emissions (Global RDE)
- 01 series — Base text
The Regulation now has three levels of approval, each with its own scope: Level 1A (4-phase WLTC), Level 1B (3-phase WLTC) and Level 2 (both).
UN R177 — System power of hybrid electric vehicles and of pure electric vehicles
- 01 series — Base text
Scope criterion (b) now reads “Are classified in categories M1 or N1”. At the manufacturer's request, type approval may be granted to “vehicles of category N2 between 3.5 and 5 tonnes maximum mass originating from a type of vehicle of category N1”.