22 June 2009 Proposal for amendments to Regulation No. 51 (Netherlands) GRB/2009/4	GRB/2009/4	2009-06-22
22 June 2009 Proposal for amendments to Regulation No. 51 (Netherlands) GRB/2009/5	GRB/2009/5	2009-06-22
29 July 2009 Proposal for amendments to Regulation No. 51 (OICA) GRB/2009/6	GRB/2009/6	2009-07-29
7 July 2009 Draft proposal for changes to document GRB-2005-02/Rev.2 (R51.03) in order to incorporate the Additional Sound Emission Provisions GRB-50-01	GRB-50-01	2009-07-07