427 § 6913. Aviation cadets: appointment as reserve officers (a) An aviation cadet who fulfills the requirements of section G023 (b) of this title may be appointed an eaisign in the Naval Reserve or a second lieutenant in the Marine Corps Reserve and designated a naval aviator. (b) Aviation cadets who complete their training at approximately the same time are considered for all purposes to have begun their commissioned service on the same date, and the decision of the Secretary of the Navy in this regard is conclusive. § 6914. Reserve naval a v i a to r s: appointment in Regular Navy and Regular Marine Corps; eligibility; g r a d e; r a n k (a) The President, by and with the advice and consent of the Senate, may appoint to the active list in the line of the Navy as many officers of the Naval Reserve, and may appoint to the active list of the Marine Corps as many officers of the Marine Corps Reserve, as he considers necessary. To be eligible for an appointment under this section an officer must— (1) be a naval aviator; (2) have successfully completed aviation cadet training when he was under 25 years of age; (3) establish his mental, moral, professional, and physical qualifications under such regulations as the Secretary of the Navy prescribes; and (4) have completed, on June 30 of the calendar year in which appointed, at least 18 months of continuous active service after he completes his aviation cadet training. (b) Each officer appointed under this section shall be appointed in the same grade that he holds in the Naval Reserve or the Marine Corps Reserve. An officer appointed in the grade of ensign or second lieutenant ranks from the date he reported for continuous active duty as an officer of the Naval Reserve or the Marine Corps Reserve. An officer appointed in a grade above ensign or above second lieutenant ranks according to his date of rank in that grade m the Naval Reserve or the Marine Corps Reserve, as the case may be. (c) While an officer is serving in the grade in which appointed under subsection (a), the requirement of sea service under section 6770 of this title does not apply. § 6915. Reserve student aviation pilots; reserve aviation pilots: appointments in commissioned g r a d e (a) Under such regulations as the Secretary of the Navy prescribes, enlisted members of the Naval Reserve and the Marine Corps Reserve may be designated as student aviation pilots. (b) A. member who is not a qualified civilian aviator may not be designated as a student aviation pilot unless he agrees in writing, with the consent of his parent or guardian if he is a minor, to serve on active duty for a period of two years after successfully completing flight training, unless sooner released. Such a student aviation pilot may be released from active duty or discharged at any time by any administrative authority prescribed by the Secretary. (c) If he is a qualified civilian aviator, a student aviation pilot may be given a brief refresher course in flight training.