10 U.S.C. § 2245 - U.S. Code - Unannotated Title 10. Armed Forces § 2245. Use of aircraft for proficiency flying: limitation

(a) An aircraft under the jurisdiction of a military department may not be used by a member of the armed forces for the purpose of proficiency flying except in accordance with regulations prescribed by the Secretary of Defense.

(b) Such regulations--

(c) In this section, the term “proficiency flying” means flying performed under competent orders by a rated or designated member of the armed forces while serving in a non-aviation assignment or in an assignment in which skills would normally not be maintained in the performance of assigned duties.