Section 347(e) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(e)[ Instructor Branch. - (i) Instructor Sub-Lieutenant to Instructor Lieutenant-An officer must have three years' seniority as Sub-Lieutenant." [Substitued by S.R.O. 55, dated 2nd Februray, 1967](ii)Instructor Lieutenant to Instructor Lieutenant Commander.-An officer must have 8 years' seniority as Instructor Lieutenant.]
