24 Aug 2021 UN R138: Proposal for Supplement 3 to the 01 series of amendments (Switzerland) GRBP-74-02 2021-08-24
24 Aug 2021 UN R138: Proposal for amendments to Supplement 2 of the 01 series of amendments (France) GRBP-74-05 2021-08-24
12 Sep 2021 UN R138: Comments on proposal for Supplement 3 to the 01 series of amendments (OICA) GRBP-74-28 2021-09-12
22 Jan 2022 UN R138: Background noise criteria - ISO 16254 Technical Measurement Development (ISO) GRBP-75-03 2022-01-22
8 Feb 2022 GRBP work program priorities GRBP-75-35 2022-02-08
10 Feb 2022 UN R138: Proposal for draft Terms of Reference of IWG for revision (OICA) GRBP-75-42 2022-02-10
11 Feb 2022 UN R138: Comments on the draft terms of Reference of IWG (China) GRBP-75-44 2022-02-11
28 May 2018 QRTV: Technical comparison of FMVSS 141 and UN R138 (ISO) GTRQRTV-06-06 2018-05-28
25 Jul 2018 Regulations Worldwide on Minimum Sound Emission of Quiet Vehicles (OICA) GTRQRTV-06-09/Rev.1 2018-07-25
5 Jul 2022 Draft guidelines for the task force on the Revision of UN R138.01 TFQRTV-01-03/Rev.1 2022-07-05