Section 191(4) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(4)A candidate for the Branch Rank who fails in the prescribed qualifying course may, on the expiry of 2 years from the date of failure, be allowed further opportunity to qualify if still otherwise eligible, and may be given his original position on the course roster, provided he satisfies the following conditions:(a)recommended for a further trial by the Commanding Officer of the ship or establishment concerned; and(b)continuously recommended for Branch Rank under Regulation 181;If accepted, he shall be required to take all the courses and the examination, and on qualifying, may be considered for promotion alongwith other eligible sailors.