Pub. L. 84-1028, tit. 10, subtit. C, pt. II, ch. 537, sec. 5535
Evidence of age required for certain enlistments of minors
§ 5535. Evidence of age required for certain enlistments of minors No minor may be enlisted in the Regular Navy as a seaman, seaman apprentice, or seaman recruit, unless he shows that he is of an age eligible under regulations to enlist by presenting to the recruiting officer, with his application for enlistment— (1) a birth certificate; (2) a verified written statement by either parent; or (3) a verified written statement by his legal guardian, if his parents are dead. However, if such a certificate or statement is unobtainable, a minor may be enlisted in such a grade if the recruiting officer is convinced that the oath of the applicant as to his age is credible.