Section 193(2) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(2)Before a candidate is selected to take the professional course and examination, he must;(a)be qualified under Regulation 181;(b)be a Leading Cook or Leading Steward, qualified professionally for Petty Officer Cook or Petty Officer Steward;(c)have completed 7 years of service;(d)have passed the modified educational test for Branch Rank.