| GRBP/2019/20 | GTR 16: Technical Report for Amendment 2 | |
| GRBP/2019/21 | GTR 16: Proposal for Amendment 2 | |
| GRBP-70-02 | GTR 16: Consolidated GTR incorporating draft Amendment 2 | |
| GRBP-70-18/Rev.1 | GTR 16: Presentation on draft Amendment 2 | |
| GRBP-70-17/Rev.1 | GTR 16: Proposal for amendments to document GRBP/2019/21 |