Section 89(1) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(1)When a President, or Royal personage is passing in a boat or tender, or when the Flag Officer, or Commodore as specified in Regulation 84, with his flag or broad pendant flying in a boat or tender, is passing a ship not under way, the guard and band shall be paraded, the bugles sounding, and the salute as laid down in Regulations 82 to 84 given, unless otherwise ordered.
