| UN R50: Revision 3 (2013) |
| UN R50: Revision 3-Amendment 1 (2015) |
| UN R50: Revision 3-Amendment 2 (2016) |
| Revision 3 | Amendment 3 (2017) |
| Revision 3 | Amendment 4 (2018) |
| Revision 3 | Amendment 5 (2019) |
| UN R50: Revision 2 (2009) |
| UN R50: Revision 2-Corrigendum 1 (2009) |
| Revision 2 | Corrigendum 2 (2010) |
| UN R50: Revision 2-Corrigendum 3 (2012) |
| UN R50: Revision 2-Amendment 1 (2011) |
| UN R50: Revision 2-Amendment 2 (2011) |
| UN R50: Revision 2-Amendment 3 (2011) |
| UN R50: Revision 2-Corrigendum 1-Revision 1 (2009) |
| Earlier texts may be available through the UN Official Document System. |