10 U.S. Code § 10145. Ready Reserve: placement in
(d) Under such regulations as the Secretary concerned may prescribe, any qualified member of a reserve component or any qualified retired enlisted member of a regular component may, upon his request, be placed in the Ready Reserve. However, a member of the Retired Reserve entitled to retired pay or a retired enlisted member of a regular component may not be placed in the Ready Reserve unless the Secretary concerned makes a special finding that the member’s services in the Ready Reserve are indispensable. The authority of the Secretary concerned under the preceding sentence may not be delegated—
to a member of the armed forces below the level of the lieutenant general or vice admiral in an armed force with responsibility for military personnel policy in that armed force.
Provisions similar to those in this section were contained in section 269(a)–(d) of this title, prior to repeal by Pub. L. 103–337, § 1661(a)(2)(A).