UN R29: Revision 2 (2012)
UN R29: Revision 2-Amendment 1 (2014)
UN R29: Revision 2-Amendment 2 (2015)
UN R29: Revision 2-Amendment 3 (2016)
Revision 2 | Amendment 4 (2019)
UN R29: Revision 1 (1993)
UN R29: Revision 1-Amendment 1 (1999)
UN R29: Revision 1-Amendment 2 (2007)
UN R29: Revision 1-Amendment 3 (2014)
Earlier texts may be available through the UN Official Document System.