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 allow the use of virtual testing as alternative methodology to physical tests.

Consolidated revision prepared by the GRVA secretariat for review. Revision 1 incorporates all valid text up to:

• Supplement 1 to the original version of the Regulation
• 01 series of amendments.

Consolidated version of the regulation prepared by the GRVA secretariat and incorporating all valid text through:

• Supplement 1 to the 01 series of amendments
• Supplement 2 to the 01 series of amendments
• 02 series of amendments.

Proposal to permit the use of virtual testing as an alternative methodology to the physical tests. This approach requires the preliminary assessment of the methodology to be used.