This paper seeks to clarify the expected approval process to be utilized by Contracting Parties concerning UN Regulation No. 131 which requires Contracting Parties applying UN R131 and UN R152 to recognise approvals to either Regulation as equally valid for vehicles of category M₂ and for those of category M₃/N₂ with a maximum weight below or equal to 8t and equipped with a hydraulic braking system.

Proposal to clarify requirements in the scope requesting for reciprocal recognition with United Nations Regulation No. 131 (Advanced
Emergency Braking Systems (AEBS).

Proposal to resolve issues with accepting the approval of M₂, M₃ and N₂ vehicles to R152.

Proposal to correct errors in the text of the 02 series and its supplements.

Proposal to:

1. Clarify that the PBC values listed in para. 2.14. are minimum values,
2. Align the collision-warning requirements of para. 5.2.1.1. with those for the pedestrian and bicycle scenarios under paras. 5.2.2.1 and 5.2.3.1., and
3. Clarify para. 5.2.1.2. based on feedback from a recent public consultation in Australia.

Proposal to amend paragraph 2.14. to clarify that road surface friction coefficient of at least the specified Peak Braking Coefficient represents minimum values; amend paragraph 5.2.1.1. to align collision warning requirements with pedestrian and bicycle scenarios, requiring collision warning no later than 0.8 seconds before emergency braking or at braking start if anticipation time is insufficient; amend paragraph 5.2.1.2. to clarify that emergency braking involves a braking demand of at least 5.0 m/s² to the service braking system, permitting higher demands during collision warning for short durations.

Proposal to amend paragraph 5.4.2.3. of the 01 series of amendments and the original version to UN R152 to require at least two deliberate actions by the driver where automatic deactivation of the AEBS function is a consequence of the driver manually switching off the ESC function of the vehicle. Footnotes 2 to 8 in the 01 series are renumbered to accurately reference correct footnotes. This revision addresses GRVA-24-04.

Proposal to remove para. 5.2.1.2. titled “Emergency braking” and delete the corresponding justification text “Update to paragraph 5.2.1.2.” At the January 2026 GRVA, it was agreed not to proceed with an amendment proposed to para. 5.2.1.2. The current proposal GRVA/2026/21 does not reflect the discussions from the previous session of GRVA.