Section 38(1) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(1)Unless otherwise directed by the chief of the Naval Staff salutes shall be fired by all ships except destroyers, commanded by a Captain or Commander and carrying four or more Q.F. guns of the same nature, suitably placed, or provided with a saluting armament of light Q.F.guns. Ships in the Reserve Fleet, however, that would otherwise be regarded as saluting ships shall, generally, be considered non-saluting ships while in Reserve.
