Comparison ECE R51.03 (as adopted by GRB) versus the draft China regulation GB1495 for M1 vehicle noise and proposal for reconciling apparent differences between them.

Proposal to permit a 74dB(A) limit value for the noise of micro-vans and micro-trucks.

Presentation on the ISO project to provide a basis for the type approval of vehicles using an indoor pass-by test for noise levels.

Proposal from the informal working group on Un Regulations Nos. 51 and 59 for further amendments to the draft 03 series of amendments to UN R51 (document GRB/2014/5).