18 Mar 2009 Proposal for draft Supplement 16 to Regulation No. 23 (Poland) GRE-61-08 2009-03-18 Poland
16 Jul 2009 Proposal for draft Supplement 16 to Regulation No. 23 (Poland) GRE/2009/42 2009-07-16 Poland
31 Jan 2013 Proposal for collective amendments - Regulations Nos. 6, 7, 19, 23, 38, 87 and 91 (Poland) GRE/2013/16 2013-01-31 Text prepared by Poland and Austria to clarify the possibility of installing on vehicles light-signalling devices which obtained a type approval according to component UN Regulations. Poland