29. GRSP considered ECE/TRANS/WP.29/GRSP/2013/26 introducing the FlexPLI provisions into the UN Regulation. GRSP considered and adopted GRSP-54-15-Rev.1 (superseding ECE/TRANS/WP.29/GRSP/2011/14, ECE/TRANS/WP.29/GRSP/2011/20 and ECE/TRANS/WP.29/GRSP/2013/26), as reproduced in Addendum 1 to the session report. The secretariat was requested to submit the proposal to WP.29 and AC.1, for consideration and vote at their June 2014 sessions as draft 01 series of amendments to UN Regulation No. 127. GRSP noted that pending values still in square brackets (paras. 1.1. and 1.4. of Annex IV of GRSP-54-15-Rev.1), would be eventually solved at the May 2014 session of GRSP. Finally, the expert from Japan withdrew GRSP-54-39.