WP.29 199th session: amendments to UN Regulations
23–26 June 2026
Amendments to UN Regulations that the WP.29 documents submitted for the vote at the 199th session. Each change report shows what changes, why, and who is affected.
This list has the 115 amendments with a RegVault change report, in 94 regulations. It is not the full agenda of the session.
UN R10 — Electromagnetic compatibility
- 07 series — Supplement 3
Supplement 3 now takes into account vehicles of categories X and Y and conventional vehicles with an Automated Driving System (ADS).
UN R11 — Door latches and hinges
- 04 series — Supplement 3
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R12 — Steering mechanism
- 05 series — Supplement 1
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R13 — Heavy vehicle braking
- 15 series — Supplement 3
Vehicles of categories M2, M3 and N without manual braking controls for normal operation are no longer outside the scope (para. 1.2.5. deleted).
- 14 series — Supplement 4
This supplement adds the words “regardless of its means of activation” to paragraph 5.2.1.31. on the emergency braking signal.
- 13 series — Supplement 7
This supplement adds the words “regardless of its means of activation” to paragraph 5.2.1.31. on the emergency braking signal.
- 12 series — Supplement 9
This supplement adds the words “regardless of its means of activation” to paragraph 5.2.1.31. on the emergency braking signal.
UN R13H — Braking of passenger cars
- 02 series — Supplement 2
Vehicles without manual braking controls for normal operation are no longer excluded, and two control rules now exempt categories X and Y.
UN R14 — Safety-belt anchorages
- 09 series — Supplement 5
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R16 — Safety-belts
- 10 series — Supplement 3
The Regulation now accounts for vehicles of category X, and it does not apply to vehicles of category Y.
UN R17 — Strength of seats, their anchorages and head restraints
- 12 series — Supplement 1
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
- 11 series — Supplement 2
In the definition of “Head restraint”, the words “at any point” are now “at at least one point”.
- 10 series — Supplement 1
In the definition of “Head restraint”, the words “at any point” are now “at at least one point”.
UN R18 — Anti-theft of motor vehicles
- 03 series — Supplement 5
New paragraphs 0. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
UN R21 — Interior fittings
- 01 series — Supplement 6
New section 0. says that the Regulation is amended to account for vehicles of category X.
UN R24 — Visible pollutants, measurement of power of C.I. engines (Diesel smoke)
- 03 series — Supplement 12
Paragraph 24.3.1. adds a vehicle equipped with an ADS to the rule on special test procedures for hybrid electric vehicles.
UN R26 — External projections of passenger cars
- 04 series — Supplement 1
New paragraphs 0. to 0.1.2. add an Introduction on vehicles of category X and on vehicles with an ADS.
UN R28 — Audible warning devices
- 00 series — Supplement 7
The definition of “audible warning device” in paragraph 2.1. adds “or operated by an ADS, as defined in paragraph 11.4.”.
UN R29 — Cabs of commercial vehicles
- 03 series — Supplement 7
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R34 — Prevention of fire risks
- 04 series — Supplement 1
No special provisions or exemptions apply to vehicles with an ADS in any driving mode (new para. 0.1.2.).
UN R39 — Speedometer and odometer
- 02 series — Supplement 2
For vehicles of categories X and Y, an on-board odometer is required, but a speedometer is optional and need not meet this Regulation.
UN R43 — Safety glazing
- 01 series — Supplement 13
New paragraph 0.1.3. states that the Regulation applies to vehicles of categories X and Y if glazing is installed.
UN R45 — Headlamp cleaners
- 01 series — Supplement 14
Paragraph 6.5.4. now says that the control of the cleaning device may be manual or automatic.
UN R46 — Devices for indirect vision
- 07 series — Supplement 1
This Regulation does not apply to vehicles of category Y or to vehicles of category X without a manual mode operated on-board the vehicle.
UN R48 — Installation of lighting and light-signalling devices
- 09 series — Supplement 4
New paragraph 5.38. sets special requirements for vehicles equipped with an ADS, for example ADS control of the lighting functions.
- 08 series — Supplement 9
New paragraph 5.38. sets special requirements for vehicles equipped with an ADS, for example ADS control of the lighting functions.
- 07 series — Supplement 11
New paragraph 6.28. adds the optional direction indicator projection, an amber light signal projected on the ground.
- 06 series — Supplement 24
New paragraph 6.28. adds the optional direction indicator projection, an amber light signal projected on the ground.
UN R49 — Emissions of C.I. and P.I. (LPG and CNG) engines
- 07 series — Supplement 4
Annex 11 and related paragraphs now name the “vehicle user warning system” and the “vehicle user inducement system”. New paragraph 2.68. defines “vehicle user”, in the context of this Regulation, as a driver or ADS user.
UN R51 — Noise of M and N categories of vehicles
- 03 series — Supplement 11
New definitions, new test mass rules and a new Annex 10 cover vehicles equipped with an Automated Driving System (ADS).
UN R55 — Mechanical couplings
- 03 series — Supplement 1
For vehicles with an ADS, the engagement status of the coupling must be sent to the ADS as a logic signal.
UN R58 — Rear underrun protective devices (RUPDs)
- 03 series — Supplement 4
New paragraphs 0. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
UN R61 — External projections of commercial vehicles
- 00 series — Supplement 5
For vehicles of category Y without a cab, paragraph 2.5. replaces the “cab rear panel” with a theoretical vertical transversal plane. This plane is 350 mm behind the rearmost point of the tyre of the foremost front axle.
UN R64 — Temporary use spare unit, run flat tyres
- 03 series — Supplement 2
For vehicles of category X or Y, paragraph 5.1.6.1. now requires that a logical signal is transmitted to the ADS.
UN R66 — Strength of superstructure (buses)
- 02 series — Supplement 1
New paragraphs 0. to 0.1.2. add an Introduction on vehicles of category X and on conventional vehicles equipped with an ADS.
UN R67 — LPG vehicles
- 04 series — Supplement 3
New paragraphs 0. to 0.1.3. add an Introduction on vehicles of categories X and Y and conventional vehicles with an ADS.
UN R73 — Lateral protection devices
- 02 series — Supplement 1
New paragraphs 0. and 0.2. to 0.2.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
- 01 series — Supplement 3
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
UN R75 — Tyres for L-category vehicles
- 00 series — Supplement 22
The Regulation now applies to new pneumatic tyres “designed primarily” for vehicles of category L.
UN R79 — Steering equipment
- 05 series — Base text
Paragraph 1.2.4. is deleted, so vehicles of categories M and N without manual steering controls intended for use during normal operation are no longer excluded.
- 04 series — Supplement 11
Any ACSF of Category A must fulfil the requirements of paragraph 5.6.1. unless the vehicle has a DCAS which meets conditions (a) to (c).
- 03 series — Supplement 16
Any ACSF of Category A must fulfil the requirements of paragraph 5.6.1. unless the vehicle has a DCAS which meets conditions (a) to (c).
UN R83 — Emissions of M1 and N1 vehicles
- 09 series — Supplement 1
New paragraph 9.7. and new Annex 14 add in-service conformity checks of system power, and these checks are optional.
- 08 series — Supplement 4
For vehicles of categories X and Y, the mass in Annex 1, paragraph 2.6. must not include the mass of the driver.
UN R85 — Measurement of the net power and the 30 min. power
- 00 series — Supplement 14
In Annex 6, paragraph 2.5.1., the net power test now uses maximum acceleration demand instead of the accelerator control set at the maximum position.
UN R89 — Speed limitation of devices
- 00 series — Supplement 4
Paragraphs 5.1.4., 5.1.6., 5.1.7., 13.1.3., 21.1.4. and 21.1.6. now also cover demands by the ADS.
UN R90 — Replacement braking parts
- 02 series — Supplement 13
Annexes 3, 4, 7, 11 and 14 add test rules for vehicles of Categories X and Y and for other vehicles with an ADS.
UN R93 — Front underrun protective devices
- 00 series — Supplement 2
New paragraphs 0. and 0.1. add an Introduction on vehicles of categories X and Y and ADS vehicles with a manual mode above 6 km/h.
UN R94 — Frontal collision protection
- 05 series — Supplement 2
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R95 — Lateral collision protection
- 06 series — Supplement 2
New section 0. says that the Regulation is amended to account for vehicles of category X. New paragraph 1.2. says that the Regulation does not apply to vehicles of category Y.
UN R97 — Vehicle Alarm Systems (VAS)
- 01 series — Supplement 10
New paragraphs 0. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
UN R100 — Electric power trained vehicles
- 05 series — Supplement 1
New section 0. says that the Regulation is amended to account for vehicles of categories X and Y.
- 04 series — Supplement 3
When the isolation resistance monitoring system detects an isolation resistance below the requirements, a category O trailer must warn the driver of the towing vehicle.
- 03 series — Supplement 6
When the isolation resistance monitoring system detects an isolation resistance below the requirements, a category O trailer must warn the driver of the towing vehicle.
UN R102 — Close-coupling device (CCD)
- 00 series — Supplement 1
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
UN R106 — Tyres for agricultural vehicles
- 00 series — Supplement 22
Paragraph 1.1. now says tyres “designed primarily” for agricultural and forestry vehicles in categories T, R and S, in place of “designed primarily, but not only,”.
UN R107 — General construction of buses and coaches
- 11 series — Supplement 2
New paragraphs 2.49. and 2.50. define ADSF-1 and ADSF-2, and many provisions add rules for vehicles equipped with an ADSF-2.
UN R108 — Retreaded tyres for passenger cars and their trailers
- 01 series — Supplement 2
The definition in paragraph 2.48. is deleted, and paragraph 2.51. now defines “Material supplier” in place of “Material manufacturer / material supplier”.
UN R109 — Retreaded tyres for commercial vehicles and their trailers
- 01 series — Supplement 2
Paragraph 2.59. is deleted, and paragraph 2.4. now defines “Material supplier” in place of “Material manufacturer / material supplier”.
UN R110 — CNG and LNG vehicles
- 06 series — Supplement 2
New paragraphs 0. and 0.1. to 0.1.3. add an Introduction on vehicles of categories X and Y and on conventional vehicles with an ADS.
UN R115 — LPG and CNG retrofit systems
- 00 series — Supplement 11
New paragraphs 2.10. and 2.11. define “ADS user” and “vehicle user”.
UN R116 — Anti-theft and alarm systems
- 01 series — Supplement 4
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of category X and Y and on vehicles with an ADS. New paragraphs 2.17. and 2.18. define ADSF-1 and ADSF-2.
UN R117 — Tyres rolling resistance, rolling noise and wet grip
- 04 series — Supplement 4
Paragraphs 1.3., 2.21., 3.1.1.1. and 5.7. to 5.10. on tyre abrasion are deleted. Annex 10, the procedure for determining the abrasion performance of tyres of class C1, is also deleted with all its appendices.
- 02 series — Supplement 18
Paragraph 2.18. now refers to ASTM F2872 – 25 for SRTT16C, F2871 – 25 for SRTT19.5 and F3678 – 25 for SRTT19.5 siped.
UN R121 — Identification of controls, tell-tales and indicators
- 01 series — Supplement 8
The scope now excludes category Y vehicles and category X vehicles without a manual mode that is intended to be operated on-board the vehicle.
UN R122 — Heating systems
- 01 series — Base text
Annex 5, paragraph 2.1. now applies to parts likely to come into contact with occupants during normal road use, instead of the driver. Their limit is 70°C for uncoated metal or 80°C for other materials.
UN R125 — Forward field of vision of drivers
- 03 series — Supplement 1
Under new paragraph 1.4., this UN Regulation does not apply to vehicles of category Y. It also does not apply to vehicles of category X without a manual mode operated on-board the vehicle.
UN R127 — Pedestrian safety
- 04 series — Supplement 4
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
- 03 series — Supplement 5
For all tests to the windscreen, resultant acceleration and jerk versus time histories must be provided and evaluated against the atypical fracture criteria. New paragraphs 4.8. to 4.10. require the test results of the cowl monitoring area and the windscreen to be uploaded to DETA in English.
- 02 series — Supplement 2
The joint friction torque of the upper legform impactor is now set to a minimum of 650 Nm but no more than 850 Nm.
UN R129 — Enhanced Child Restraint Systems (ECRS)
- 05 series — Base text
Annex 18, Table 1 has new shoulder height values for statures from 40 cm to 70 cm.
- 04 series — Supplement 5
Paragraph 7.1.3.6.: the examples of an Enhanced Child Restraint System that requires substantial modification for different sizes now include "when an insert is provided/removed".
UN R130 — Lane departure warning system (LDWS)
- 01 series — Supplement 2
New paragraph 1.2. says that the Regulation does not apply to vehicles of Categories X and Y.
UN R131 — Advanced emergency braking systems (AEBS)
- 02 series — Supplement 4
At the request of the manufacturer, vehicles “of Category M2, and for those of Category M3 / N2 with a maximum mass below or equal to 8,000 kg, not equipped with a pneumatic braking system” can be approved if they meet “paragraph 5. of the 02 or later series of amendments to UN Regulation No. 152”, subject to conditions.
UN R133 — Recyclability of motor vehicles
- 00 series — Supplement 2
In footnotes 1, 2 and 3, the reference to R.E.3 is now to document ECE/TRANS/WP.29/78/Rev.8.
UN R134 — Hydrogen and Fuel Cell Vehicles (HFCV)
- 03 series — Supplement 1
New section 0. says that the Regulation is amended to account for vehicles of category X.
- 02 series — Supplement 4
In Annex 3, table 3, the number of cycles in the first row is now “60 per cent of initial cycle life (11 000 cycles)”.
UN R135 — Pole Side Impact (PSI)
- 02 series — Supplement 4
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R137 — Restraint system in front impact
- 04 series — Supplement 1
The Regulation is now amended to account for vehicles of category X, and it does not apply to vehicles of category Y.
UN R138 — Quiet road transport vehicles (QRTV)
- 02 series — Supplement 2
New Annex 5 gives special provisions for the testing of vehicles equipped with an ADS. The Annex says that it does not add nor remove any requirement.
UN R139 — Brake assist systems (BAS)
- 00 series — Supplement 3
New paragraph 1.2.3. adds vehicles of Categories X and Y to the vehicles that this Regulation does not cover.
UN R140 — Electronic Stability Control (ESC)
- 00 series — Supplement 8
The ESC system must now also be operational whilst an ADS feature is active, except in the cases that paragraph 6.2. lists.
UN R141 — Tyre pressure monitoring systems (TPMS)
- 01 series — Supplement 3
New Annex 9 gives special provisions for testing vehicles equipped with an ADS and says that it does not add nor remove any requirement.
UN R142 — Tyre installation
- 01 series — Supplement 3
New paragraphs 2.23. to 2.26. define “Automated Driving System (ADS)”, “Dynamic Driving Task (DDT)”, “Category X vehicles” and “Category Y vehicles”.
UN R143 — Heavy duty dual-fuel engine retrofit systems (HDDF-ERS)
- 00 series — Supplement 2
A dual-fuel engine retrofit system capable of operating on vehicles equipped with an ADS must send a signal to the ADS about the engine mode.
UN R144 — Accident emergency call systems (AECS)
- 01 series — Supplement 2
This Regulation now does not apply to manual triggering of the AECS while both an ADSF-2 is active, and the vehicle is not carrying passengers. Vehicles of category Y are now excluded from its scope.
UN R145 — ISOFIX anchorage systems, ISOFIX top tether anchorages and i-Size seating positions
- 01 series — Supplement 2
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R148 — Light-Signalling Devices (LSD)
- 01 series — Supplement 7
The scope of the Regulation now includes front and rear direction indicator projectors (DPF and DPR), with requirements in new paragraph 5.13.
UN R151 — Blind Spot Information System for the Detection of Bicycles
- 00 series — Supplement 5
This UN Regulation does not apply to vehicles of category Y (para. 1.3.). It also does not apply to vehicles of category X without a manual mode which is intended to be operated on-board the vehicle.
UN R152 — Advanced Emergency Braking System (AEBS)
- 02 series — Supplement 6
The AEBS must be deactivated upon activation of an ADS feature and automatically reactivated upon deactivation of an ADS feature.
UN R153 — Fuel system integrity and electric power train safety at rear-end collision
- 01 series — Supplement 1
The Regulation now accounts for vehicles of category X and does not apply to vehicles of category Y.
UN R156 — Software update and software update management system
- 00 series — Supplement 1
The model declaration of compliance now has a line for the series of amendments number of UN Regulation No. 156.
UN R157 — Automated Lane Keeping Systems (ALKS)
- 01 series — Supplement 5
New paragraph 1.2.: this Regulation does not apply to vehicles with regards to an ALKS approved as an ADS feature under the Regulation on ADS.
UN R159 — Moving Off Information System (MOIS)
- 00 series — Supplement 3
Paragraph 1.3. gives the vehicles of category M and N that are exempted from this Regulation. New item (b) adds vehicles of category Y. It also adds vehicles of category X without a manual mode which is intended to be operated on-board the vehicle.
UN R160 — Event Data Recorder (EDR)
- 02 series — Supplement 1
Several definitions now refer to “front seated occupants” instead of the driver and the front passenger.
UN R161 — Devices against Unauthorized Use
- 00 series — Supplement 6
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of category X and Y and on vehicles equipped with an ADS. New paragraphs 2.13. and 2.14. define ADSF-1 and ADSF-2.
UN R162 — Immobilizers
- 00 series — Supplement 7
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of category X and Y and on vehicles equipped with an ADS. New paragraphs 2.4. and 2.5. define ADSF-1 and ADSF-2.
UN R163 — Vehicle Alarm systems
- 00 series — Supplement 4
New paragraphs 0. and 0.1. to 0.1.2. add an Introduction on vehicles of categories X and Y and on vehicles equipped with an ADS.
UN R165 — Reverse Warning
- 00 series — Supplement 1
New Annex 7 gives special provisions for the testing of vehicles equipped with an ADS. The Annex says that it does not add nor remove any requirement.
UN R166 — Vulnerable Road Users in Front and Side Close Proximity
- 01 series — Supplement 1
New paragraph 1.1.5. says that this UN Regulation does not apply to vehicles of category Y. It also does not apply to vehicles of category X without a manual mode which is intended to be operated on-board the vehicle.
UN R167 — Approval of Motor Vehicles with Regard to Their Direct Vision
- 01 series — Supplement 1
New paragraph 1.3. says that this UN Regulation does not apply to vehicles of category Y. It also does not apply to vehicles of category X that do not have a manual mode, intended to be operated on-board the vehicle.
- 00 series — Supplement 3
New paragraph 1.3. says that this UN Regulation does not apply to vehicles of category Y. It also does not apply to vehicles of category X that do not have a manual mode, intended to be operated on-board the vehicle.
UN R168 — Global Real Driving Emissions (Global RDE)
- 01 series — Supplement 1
New paragraph 9.3.5. says that for vehicles of categories X and Y, all tests in this Regulation must be conducted and all respective requirements fulfilled. RDE tests must use dedicated methods, ensuring that the test accurately reflects normal driving patterns.
UN R169 — Event Data Recorders for Heavy-Duty Vehicles
- 00 series — Supplement 1
New paragraph 0.5. says that Supplement 1 is introduced to take vehicles of categories X and Y into account. It also takes into account vehicles which can be operated either by a driver or an ADS.
UN R170 — Child Restraint Systems for Safer Transport of Children in Buses
- 01 series — Base text
New Part II covers CRS approved to UN Regulations Nos. 129 or 44 which may be installed in a bus seat with a 2-point belt. These CRS must fulfil the overturning and dynamic test requirements in the test bench of Annex 12.
UN R171 — Driver Control Assistance System (DCAS)
- 02 series — Base text
This UN Regulation does not apply to vehicles of Categories X and Y. DCAS must be switched to 'OFF' mode upon activation of an ADS feature.
UN R172 — Snow grip performance and traction tyre classification for retreaded tyres
- 01 series — Base text
A retreaded tyre can now also be classified as a “traction tyre” under new paragraph 6.2.2., by its number of traction elements and deformation potential (Pdef).
- 00 series — Supplement 2
Paragraph 6.4. now gives additional requirements for a special use tyre of class C1 to be classified as a ‘professional off-road tyre’. The tyre must have a tread depth ≥ 11 mm, a void-to-fill ratio ≥ 35 per cent and a speed category up to 160 km/h.
UN R173 — Installation of safety-belts, restraint systems, child restraint systems, ISOFIX child restraint systems and i-Size child restraint systems
- 01 series — Supplement 2
The Regulation is now amended to account for vehicles of category X, and it does not apply to vehicles of category Y.
UN R174 — Safety-belt reminders
- 01 series — Supplement 1
The Regulation is now amended to account for vehicles of category X, and it does not apply to vehicles of category Y.
UN R176 — Field of vision assistant
- 00 series — Supplement 2
Paragraph 1.3.: this UN Regulation does not apply to vehicles of category Y and to vehicles of category X without a driver’s seat.
UN R177 — System power of hybrid electric vehicles and of pure electric vehicles
- 01 series — Supplement 1
Vehicles of categories X and Y must be tested in the ADS testing mode of UN Regulation No. 154. Where necessary, the mode must be extended for the TP1 and TP2 tests and for “the determination of the speed of maximum power”.
UN R178 — Emergency Lane Keeping Systems (ELKS) for M1 and N1 vehicles
- 00 series — Supplement 1
New paragraph 1.2. says that this Regulation does not apply to vehicles of Categories X and Y.
UN R179 — Laboratory measurement of brake emissions for light-duty vehicles
- 00 series — Supplement 1
In Annex 5, vehicles of categories X and Y must be tested in the ADS testing mode of UN Regulation No. 154, extended where necessary.
UN R180 — On-Board monitoring (OBM) systems, Environmental Vehicle Passport (EVP) and in-vehicle display of environmental data
- 00 series — Supplement 1
New paragraphs 3.22. to 3.28. define “ADS user”, “Vehicle user”, the EEEDWS, “SCR warning”, “SCR inducement”, “OBM warning” and “OBM inducement”.