Section 210(3) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(3)Officers of the reserves who are not "Qualified Officers" take rank and command after officers of the Indian Navy and 'Qualified Officers' of the reserves of corresponding rank of any seniority. In relation to each other they take rank and command according to their respective ranks and seniorities. Officers of the same rank and seniority take rank and command in the order (1) Indian Naval Reserve,