This revised proposal of UN R9 from the IMMA contains the assimilation of the original regulations and their amendments and updates to take into consideration the revision of the test methods in UN R41.

This proposal of amendments to UN Regulation No. 9 consolidates earlier versions of UN Regulation No. 9 and aligns the test methods with those introduced into UN Regulation No. 41.

Table prepared by OICA highlighting various elements in the consideration of noise in UN Regulation Nos. 9, 28, 41, 51, 59, 63, 92, and 117.

Text adopted by the Working Party on Noise (GRB) at its fifty-sixth session as a consolidated version of the Regulation and aligning the test methods with those introduced into Regulation No. 41.

Overview of European Commission program to rework the regulatory environmental and safety framework for L-category vehicles.

Proposal from IMMA to update the transition provisions of UN R9 in line with new recommendations by UNECE WP29.