Originated in Australia as AS 1301.420s—1989.
Jointly revised and designated AS/NZS 1301.420s:2006.
Revised and redesignated as AS 1301.420:2019. Originated in Australia as AS 1301.420s-1989. Jointly revised and designated AS/NZS 1301.420s:2006. Revised and redesignated as AS 1301.420:2019.