14. GRB continued its consideration of the revised proposal for new time measurement accuracy for the rolling resistance method (ECE/TRANS/WP.29/GRB/2014/8). The expert from Japan introduced several modifications to this proposal (GRB-61-06). GRB adopted the proposal, as contained in Annex V to this report, and mandated the secretariat to submit it to WP.29 and AC.1 for consideration and vote at their June 2015 sessions as a draft Supplement 8 to the 02 series of amendments to Regulation No. 117. GRB also noted that the Working Party on Brakes and Running Gear (GRRF), at its February 2015 session, would consider a corrigendum to Supplement 6 to the 02 series of amendments to Regulation No. 117 (ECE/TRANS/WP.29/GRRF/2015/9).

29. The expert from ETRTO introduced ECE/TRANS/WP.29/GRRF/2015/9 proposing the reintroduction of the transitional provisions related to Supplement 4 to the 02 series of Amendments to Regulation No. 117 (paras. 12.8. and 12.9.) and deleted unintentionally. GRRF recognized that the deletion was not the original intention of the Contracting Parties. The expert from the Russian Federation proposed (GRRF-79-19) to reinstate the Transitional Provisions as well as the reference to Annex 4 in paragraph 2.1. of Annex 3. Based on GRRF-79-19, the Secretariat and the expert from the Russian Federation proposed GRRF-79-33 with amendments aligning the original transitional provisions with the guidelines on Transitional Provisions.

30. GRRF adopted ECE/TRANS/WP.29/GRRF/2015/9 as amended by Annex II to the session report, and requested the secretariat to submit it to WP.29 and AC.1 for consideration at their June 2015 sessions as draft Supplement 8 to 02 series of Regulation No. 117.

30. The expert from ETRTO presented GRRF-78-13 proposing a corrigendum to Supplement 2 to 02 series of UN Regulation No. 117. The proposal noted that the Supplement to UN Regulation No. 117 introducing limits for C2 tyres in paragraph 6.4.1.1. had been adopted after the parallel proposal introducing those for C3 tyres. It highlighted an unintended consequence whereby the limits for C3 tyre had been deleted. Following the discussion, GRRF agreed that, while the consequence was an error, it was not appropriate to correct the regulation using corrigenda and agreed to consider the proposal as a Supplement.