Cross References:BS S 154BS 7S 1BS 2S 96BS 1580DTD 904Incorporates the following:AMD 1800 published 29 August 1975AMD 3350 published 31 July 1980PD 4081 published 27 February 1961Amendment No. 4, January 2008. Corrigendum No. 1, January 2008. Amendment, January 2013. Amends and eplaces BS SP 114:1955