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

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.

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.