55. The secretariat introduced GRRF-78-15 reporting on the highlights of the 162nd (ECE/TRANS/WP.29/1108) and 163rd (ECE/TRANS/WP.29/1110) sessions of WP.29.

56. The secretariat introduced ECE/TRANS/WP.29/GRSG/2014/25 (initially proposed by the Working Party on Lighting and Light-Signalling (GRE)), as amended by GRRF‑78‑03 and introducing in to R.E.3, new categories of agricultural vehicles. The expert from the Russian Federation commented that the definitions proposed may create overlap especially when an agricultural vehicle could be classified as a Non Road Mobile Machinery (NRMM) and vice versa. The Chair of GRRF requested the experts to send their comments on this proposal to the secretariat.

57. Following the suggestion of the WP.29, the secretariat introduced GRRF-78-04 containing a list of definitions in the Regulations under the responsibility of GRRF. The Chair of GRRF recalled GRRF‑76‑03 and noted that no follow-up action was defined. The secretariat announced that it was looking for a central and suitable location on the website to collect this useful information.

58. Learning that Mr. Masashi Ishihara (Japan) and Mr. Jürgen Bräuninger (CLEPA) would retire and, therefore, no longer attend the sessions, GRRF acknowledged their considerable contributions to the activities of the group. GRRF wished them long and happy retirements.

59. The expert from CLEPA introduced GRRF-78-51 on difficulties linked to the definition of “variant” of brake disc/drum in UN Regulation No. 90. The expert informed that a proposal to UN Regulation No. 90 would be submitted to GRRF for consideration at its next session.