For testing purposes, UN R90 defines a “test group” as a grouping of parts having the same characteristics. The regulation then defines a “variant” as a part within a “test group”. However, the approval numbers under the rule stipulate the identification of each variant certified. As a result, the text technically requires certification of each individual part (variant) which was not the intention of the drafters. CLEPA raises this for information purposes with the intention to put forward a proposal at the next GRRF session.
26. The expert from CLEPA introduced ECE/TRANS/WP.29/GRRF/2015/10 proposing to clarify the definition of brake discs and drums variants in Regulation No. 90. The proposal received some comments. The expert from CLEPA volunteered to prepare a revised proposal for the September 2015 session of GRRF.
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.
| GRRF/2015/10 |