| Revision 4 | Amendment 1 (2020) |
| UN R9: Revision 3 (2013) |
| UN R9: Revision 3-Amendment 1 (2016) |
| Revision 3 | Amendment 2 (2017) |
| Revision 3 | Amendment 3 (2017) |
| Revision 3 | Amendment 4 (2019) |
| Earlier texts may be available through the UN Official Document System. |