10 U.S.C. § 2245: Use of aircraft for proficiency flying: limitation

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. may not require proficiency flying by a member except to the extent required for the member to maintain flying proficiency in anticipation of the member’s assignment to combat operations; and may not permit proficiency flying in the case of a member who is assigned to a course of instruction of 90 days or more. 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.