35. The Vice-Chair of GRPE, Ms. R. Urdhwareshe (India), reported to WP.29 about the results achieved by GRPE during its seventy-third session (for more details, see the report of the session ECE/TRANS/WP.29/GRPE/73).

36. WP.29 was informed about the extension of the mandate of the IWG on PMP until June 2019 with two new specific objectives in the updated terms of reference and rules of procedure: (a) Perform a Round Robin test to demonstrate the feasibility to measure particles with a size below 23 nanometre with the existing PMP methodology properly modified; (b) Develop a suggested common test procedure for sampling and assessing brake wear particles both in terms of mass and number.