| Revision 1 (2018) |
| Revision 1 | Amendment 1 (2020) |
| Revision 1 | Amendment 2 (2021) |
| Revision 1 | Amendment 3 (2023) |
| Revision 1 | Amendment 4 (2025) |
| UN R138 (2016) |
| Amendment 1 (2017) |
| Amendment 2 (2017) |
| Earlier texts may be available through the UN Official Document System. |