First published as AS/NZS 3661.1:1993.Revised and redesignated in part as AS/NZS 4586:1999.AS/NZS 4586:1999 revised and redesignated AS 4586—2013. First published as AS/NZS 3661.1:1993. Revised and redesignated in part as AS/NZS 4586:1999. AS/NZS 4586:1999 revised and redesignated AS 4586-2013. Reissued incorporating Amendment No. 1 (June 2017).