48. The Chair of GRE presented a concept for the simplification of lighting and light-signalling Regulations based on a Horizontal Reference Document (HRD) to which the common provisions of numerous individual device Regulations would be moved (WP.29-166-22). He introduced two options for HRD: (a) insert a new part B in Regulation No. 48 or (b) establish a new Resolution under WP.29, and invited the World Forum to provide guidance on the preferred option. He also mentioned that, as part of the simplification exercise, GRE had put on hold a number of adopted amendment proposals, awaiting consolidation with other amendment proposals for the same UN Regulations. WP.29 noted that OLA had pointed out legal implications, which the use of a new part B of Regulation No. 48 could entail, and called for seeking a general solution in the framework of the ongoing Revision 3 of the 1958 Agreement (WP.29-166-18). The EU representative welcomed this explanation but added that this was a legal problem for which OLA should be requested to extend their analysis and to provide their preferred option. In case a Resolution is not the legally optimum solution OLA shall be requested to provide alternative solutions.