Report of the Working Party on Noise from its February 2012 session.

Proposal of transitional provisions for the 03 series of UN R51 on vehicle noise. Importantly, the proposal seeks to address the handling of transitions and extensions between the 02 and 03 series, perhaps offering a template for transitional provisions in general.

Netherlands presentation to explain the background and rationale behind the working documents GRB/2012/02 and GRB/2012/03, respectively addressing the current status of decisions in GRB and proposals for further improvement (based on GRB and ISO work) to UN R51 on vehicle noise.

Updated JASIC presentation in support of Japanese positions for the 03 series of the UN regulation on vehicle noise (UN R51). The presentation addresses a three-stage, six-year transition to more stringent noise limitations and proposes additional vehicle subcategories.

CLEPA presentation on two alternatives for the application of “additional sound emission provisions” (ASEP) to replacement silencing systems.