Originated in Australia as AS 1605—1974.AS 1605—1974 revised and designated AS/NZS 1605:1998.AS/NZS 1605:2000 revised and redesignated, in part, AS/NZS 1605.1:2006.Second edition 2018. Originated in Australia as AS 1605-1974. AS 1605-1974 revised and designated AS/NZS 1605:1998. AS/NZS 1605:2000 revised and redesignated, in part, AS/NZS 1605.1:2006. Second edition 2018.