Section 93(1)(a) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(a)Full version(i)On all ceremonial occasions when the President is present (including broadcasts by the President on the National Days);(ii)On all ceremonial occasions for Governors [***] [Omitted by S.R.O. 17-E, dated 5th July, 1967] when they attend ceremonial parades within their States;(iii)At Republic and Independence Day Parades when the National Flag is broken; and(iv)at "Colours" when a guard and band are paraded.