First published as part of AS C75-1936 (endorsement of BS 215-1934 without amendment) AS C75-1936 revised and redesignated in part as AS C75.2-1965.
Revised and redesignated AS 1531.1-1974.
AS C75.3 first published 1965.
Revised and redesignated AS 1531.2-1974.
AS 1531.3 first published 1984.
AS 1531.1-1974, AS 1531.2-1974 and AS 1531.3-1984 revised, amalgamated and redesignated AS 1531-1991.
Reconfirmed 2016.