Section 12(4) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(4)Certain countries have regulations concerning the firing of salutes to, and in the presence of President's Flag, and the Royal Standard which differ from the rules in this Regulation and Regulation 13. When visiting foreign ports, therefore, Commanding Officers of Indian Naval Ships, shall when in doubt, ascertain the local practice in this respect and act in accordance with it, except that in no circumstances shall a Presidential or Royal salute of more than 21 guns be fired. Such foreign regulations as differ from those in this and the Regulation 13 and whose details are definitely known, are promulgated in Navy Orders.
