7 Jul 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 2009-07-07
22 Jun 2009 Proposal for amendments to Regulation No. 51 (Netherlands) GRB/2009/4 2009-06-22
22 Jun 2009 Proposal for amendments to Regulation No. 51 (Netherlands) GRB/2009/5 2009-06-22
29 Jul 2009 Proposal for amendments to Regulation No. 51 (OICA) GRB/2009/6 2009-07-29