| Revision 3 (2017) |
| Revision 3 | Amendment 1 (2020) |
| Revision 3 | Amendment 2 (2020) |
| Revision 3 | Amendment 3 (2022) |
| Revision 2 (2008) |
| Revision 2-Amendment 1 (2012) |
| Revision 2-Amendment 1-Corrigendum 1 (2012) |
| Revision 2-Amendment 2 (2012) |
| Revision 2-Amendment 3 (2013) |
| Revision 2 | Amendment 4 (2016) |
| Revision 1 (1989) |
| Earlier texts may be available through the UN Official Document System. |