| UN R40 (1979) |
| UN R40: Corrigendum 1 (1979) |
| UN R40: Corrigendum 2-Revision 1 (1981) |
| UN R40: Corrigendum 3 (1989) |
| UN R40: Corrigendum 4 (1997) |
| UN R40: Amendment 1 (1988) |
| UN R40: Amendment 2 (2007) |
| Earlier texts may be available through the UN Official Document System. |