15. The Chairman of the informal group on the Particle Measurement Programme (PMP) reported on the progress made by the group with regard to the heavy duty validation exercise and Round Robin tests (GRPE-60-16). He recommended that the laboratories should monitor and manage the tunnel background and that the sample flow extraction for particle number should be corrected in case of the partial flow dilution system and the particulate mass measurement method. He added that a higher variability of the World harmonized Steady state Cycle (WHSC) was needed too. GRPE endorsed the recommendations and conclusions by the informal group on PMP.

16. GRPE noted the final report on the results of the heavy duty inter-laboratory correlation exercise (ECE/TRANS/WP.29/GRPE/2010/9).

17. The PMP Chairman introduced ECE/TRANS/WP.29/GRPE/2010/7 and GRPE-60-08 proposing to insert particle number measurement procedures into Regulations No. 49. GRPE adopted ECE/TRANS/WP.29/GRPE/2010/7 as amended by Annex V (download the session report from the “Documents” section to see this Annex) to this report. The secretariat was requested to submit the adopted proposal to WP.29 and AC.1, for consideration at their November 2010 sessions, as Supplement 4 to the 05 series of amendments to Regulation No. 49.

18. The expert from the United Kingdom presented a proposal to clarify, correct and update elements of the provisions of Annex 4a to Regulation No. 83 (ECE/TRANS/WP.29/GRPE/2010/8). GRPE adopted the document, not amended, and requested the secretariat to submit it to WP.29 and AC.1, for consideration at their November 2010 sessions, as Corrigendum to Supplement 7 to the 05 series of amendments to Regulation No. 83.

19. The expert from EC underlined that the same corrections reproduced in ECE/TRANS/WP.29/GRPE/2010/8 would apply to the 06 series of amendments to Regulation No. 83, which had recently been adopted by WP.29 at its March 2010 session on the basis of documents ECE/TRANS/WP.29/2009/57 and Corr.1, ECE/TRANS/WP.29/2009/134 and ECE/TRANS/WP.29/2010/56. GRPE invited the secretariat to also prepare the above corrections as Corrigendum 1 to the 06 series of amendments to Regulation No. 83, for consideration by WP.29 and AC.1 at their November 2010 sessions.

20. The GRPE Chairman invited the PMP group to meet again prior to the next session of GRPE (see para. 57 below) in January 2011.
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57. For its sixty-first session to be held in Geneva, Palais des Nations, GRPE decided to start on Monday, 10 January 2011, at 10.00 a.m. until Friday, 14 January 2011, 5.30 p.m., subject to confirmation by the secretariat (see GRPE-61-01). For that purpose, the following time schedule and provisional agenda was suggested:
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7. Informal meeting of the GRPE working group on Particle Measurement Programme (PMP)

To be held on Wednesday afternoon, 12 January 2011, from 4.00 p.m. till 5.30 p.m.

The agenda of the meeting will be prepared by the PMP secretariat and distributed to the members of the group prior to the meeting.