First published as part of AS A140-1964.Revised and redesignated in part as AS 1226.6-1980.Revised and redesignated as AS 1226.4-1984.Jointly revised and redesignated as AS/NZS 4456.4:1997.Second edition 2003. Originated as Part of AS A140-1964. Previous edition AS/NZS 4456.4:1997. Second edition 2003. Reissued incorporating Amendment No. 1 (August 2004). Reissued incorporating Amendment No. 2 (September 2009).