Proposal to introduce provisions for implementing the option (contained in footnote) for approval of certain “medium-duty” vehicles either under UN R152 (M₁/N₁) or UN R131 (M₂/N₂ /M₃). The proposal aims to clarify terms and establish procedures for demonstrating equivalent performance.

Proposals to resolve issues with accepting the approval of M₂, M₃ and N₂ vehicles to Regulation No. 152.