| Revision 3 (2016) |
| UN R51: Revision 3-Amendment 1 (2016) |
| Revision 3 | Amendment 2 (2018) |
| Revision 3 | Amendment 3 (2018) |
| Revision 3 | Amendment 4 (2019) |
| Revision 3 | Amendment 5 (2019) |
| Revision 3 | Amendment 6 (2020) |
| Revision 3 | Amendment 7 (2023) |
| Revision 3 | Amendment 8 (2023) |
| Revision 3 | Amendment 9 (2024) |
| Revision 3 | Amendment 10 (2025) |
| Revision 2 (2011) |
| Revision 2 | Corrigendum 1 (2012) |
| Revision 2 | Amendment 1 (2012) |
| UN R51: Revision 2-Amendment 2 (2013) |
| Revision 2 | Amendment 3 (2015) |
| Earlier texts may be available through the UN Official Document System. |