Section 189(3) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(3)Before a candidate is recommended to take the preliminary professional examination, he must :(a)be qualified under Regulation 181;(b)have passed the educational test for Branch Rank;(c)(i)in the case of Artificer.-have served for not less than six years since being rated Acting Artificer 4th class, of which 31h years must have been in a sea-going ship for General Service sailors. For Naval Aviation sailors, this 31h years service must be in a sea-going ship and/or a Naval Air Station;(ii)in the case of Mechanician-have served for not less than 2 years in a sea-going ship as Mechanician after completing the Mechanician course;(iii)in the case of Chief Electrician (Power), Petty Officer Electrician (Power), Chief Electrician (Radio), Petty Officer Electrician (Radio) (both in the General Service and in the Naval Aviation Branch-have served for not less than six years of which at least 31h years must have been in a sea-going ship for General Service sailors. For Naval Aviation sailors, this 31h years service must be in a sea-going ship and/or a Naval Air Station. Six years service must include at least one year's service as Petty Officer or Acting Petty Officer.
