6. The Chair of IWG MU reported on their activities (GRBP-77-10-Rev.1) and presented amendments to the document of reference on measurement uncertainties (GRBP-77-07 and GRBP-77-08). GRBP adopted the amendments and requested the secretariat to publish the revised document of reference on the GRBP website.

7. The expert from IWG MU introduced a proposal that aimed to amend UN Regulation No. 51 with tables showing the measurement uncertainties when performing type approval, conformity of production (COP) or field testing (e.g. market surveillance) (GRBP-77-09). Some GRBP experts suggested that these tables be included not in the UN Regulation, but in another document, for example, the above document of reference. Following an exchange of views, GRBP decided to revert to this issue at the next session.

4. The expert of IWG MU presented a revised document of reference on measurement uncertainties (ECE/TRANS/WP.29/GRBP/2022/9/Rev.1). GRBP adopted the revised document, as amended by GRBP-76-11, and requested the secretariat to publish it on the GRBP website for reference documents.

5. GRBP took note that, at the June 2022 session of WP.29, IWG MU had delivered a presentation on the general approach of how to handle measurement uncertainties in UN Regulations.

10. The expert from IWG MU introduced a general approach how to handle measurement uncertainties (ECE/TRANS/WP.29/GRBP/2022/9, as amended by GRBP-75-07, and GRBP-75-08). GRBP endorsed this document and requested the secretariat to publish it as a document of reference on the GRBP website. The expert from IWG MU pointed out that an amendment to this document would be presented at the next session. GRBP that WP.29 should be informed about the developed general approach to measurement uncertainties, because it could apply to UN Regulations beyond the scope of GRBP.

30. GRBP recalled that the reference document with a general approach and scientific background for handling measurement uncertainties in UN Regulations (ECE/TRANS/WP.29/GRBP/2022/9) was addressed under agenda item 2 (paragraph 10 above).