5. The expert from IMMA introduced GRB-58-01, proposing an amendment to the transitional provisions of the UN Regulation. In the meantime GRB also considered GRB-58-11-Rev.1, aligning GRB-58-01 to the General Guidelines for UN Regulatory Procedures and Transitional Provisions in UN Regulations (ECE/TRANS/WP.29/1044/Rev.1). Finally, GRB adopted GRB-58-01, as reproduced in Annex II to this report. The secretariat was requested to submit GRB-58-01 to WP.29 and AC.1 for consideration and vote at their March 2014 sessions as part of (see paras. 3 and 4) draft Supplement 1 to the 04 series of amendments to UN Regulation No. 41. Moreover, GRB agreed to keep GRB-58-11-Rev.1 as a reference in its agenda of the January 2014 session, awaiting a possible proposal of full revision of the transitional provisions of the UN Regulation.