8. GRB noted the decision of the World Forum for Harmonization of Vehicle Regulations (WP.29) at its June 2011 session, to postpone the voting of ECE/TRANS/WP.29/2011/64 (superseding ECE/TRANS/WP.29/GRB/2011/2 and GRB-53-27) to a further session, awaiting a proposal for limit values to be submitted by GRB (see ECE/TRANS/WP.29/1091, para. 54).

9. The expert from the Netherlands, Chair of the informal working group on Additional Sound Emission Provisions (ASEP), introduced GRB-54-17 to recognize the work done by the group. He concluded that further efforts should be made to solidify a policy proposal on limit values, as with the intended purpose.