Proposal based upon informal document GRRF-76-45 to clarify provisions on the use of Combined Braking Systems (CBS) and make some additional editorial improvements.
19. The expert from IMMA introduced ECE/TRANS/WP.29/GRRF/2014/21 based on GRRF‑76‑45, proposing general clarifications to UN Regulation No. 78 and specific requirements for the use of Combined Braking Systems (CBS) and the parking brake. He added that the amendments contained in the proposal have been aligned with those proposed for the Global Technical Regulation No. 3 below. GRRF adopted this proposal and requested the secretariat to submit it to WP.29 and AC.1 for consideration at their March 2015 sessions as draft Supplement 2 to the 03 series of amendments to UN Regulation No. 78.
20. The expert from EC introduced GRRF-78-06, supplementing document ECE/TRANS/WP.29/GRRF/2014/21, aimed at establishing technical requirements for ABS systems that are temporarily disabled e.g. in off-road conditions. The expert from Australia offered to provide further data from their current study on this issue. Following the discussion, GRRF agreed to revisit this item at its February 2015 session on the basis of a revised proposal jointly prepared by EC and IMMA.