20. The expert from EC recalled the purpose of GRRF-80-29 aimed at addressing the situation in which coupling balls would be installed right in front of registration plates or rear fog lamps. The proposal received some comments, related to the restriction on the use of a release key in paragraph 1.1.4., and he drafted a revised proposal as reproduced in GRRF-81-34. GRRF adopted the proposal as reproduced in Annex II of this report and requested the secretariat to submit it to WP.29 and AC.1 for consideration at their June 2016 sessions, as Supplement 6 to the 01 series of amendments to Regulation No. 55.