Section 117(1) in The Naval Ceremonial, Conditions Of Service And Miscellaneous Regulations, 1964
(1)Recruitment of Regular Entry Cadets in the [Executive, Engineering and Electrical Branches] [Substitued by S.R.O. 50, dated 19th February, 1981.] of the Indian Navy shall be made through acompetitive examination. This examination may be called the Army, Navy and Air Force Examination for admission to the National Defence Academy, and shall be held by,the Union Public Service Commission twice a year in accordance with the Government of India, Ministry of Defence Notification published in the Gazette of India on each occasion.