Section 200(1) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(1)Promotions from Senior Commissioned Officer and Commissioned Officer (Branch List) to Lieutenant shall be made by selection from Branch Officers who have been confirmed in the rank of Commissioned Officer (Branch List) and who have attained the age of 25 years and are within the upper age limit of 35 years. The date of determining eligibility for promotion shall be 31st January for the following March selections and 31st July for the following September selections.
