Revision 3 (2025)
Revision 3 | Amendment 1 (2021)
Revision 3 | Amendment 2 (2022)
Revision 3 | Amendment 3 (2024)
UN R55: Revision 2 (2015)
UN R55: Revision 2-Amendment 1 (2016)
Revision 2 | Amendment 2 (2017)
Revision 2 | Amendment 3 (2018)
Revision 2 | Amendment 4 (2020)
Revision 2 | Amendment 5 (2020)
Revision 2 | Amendment 5 | Corrigendum 1 (2022)
Revision 2 | Amendment 6 (2021)
Revision 2 | Amendment 7 (2022)
UN R55: Revision 1 (2001)
UN R55: Revision 1-Corrigendum 1 (2002)
UN R55: Revision 1-Amendment 1 (2010)
UNR 55: Revision 1-Amendment 2 (2011)
UN R55: Revision 1-Amendment 3 (2012)
UN R55: Revision 1-Amendment 4 (2015)
Earlier texts may be available through the UN Official Document System.