Section 200(3) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(3)Officers selected for promotion shall undergo special courses of instruction, and on completion of the respective courses, provided they are recommended, they shall be promoted. During the course, they shall retain their existing rank as Branch Officers, and if not recommended for promotion on termination of the course, they shall revert to their former duties as Branch Officers.Explanation. - Senior Commissioned /Commissioned Bandmaster selected for promotion to Lieutenant shall not be required to undergo any special courses of instruction before promotion.
