The Ready Reserve is a U.S. Department of Defense program which maintains a pool of trained service members that may be recalled to active duty should the need arise.
It is composed of service members that are contracted to serve in the Ready Reserve for a specified period of time as a reservist or in active duty status.
Members of the Ready Reserve are required to be prepared for mobilization or re-activation within a specified period of time, maintain a serviceable uniform, and maintain a degree of fitness.
Specific provisions for creation of the Ready Reserve can be found in sections § 12301(a) and § 12302.
Other sections describe rules for recall to Active Duty (§§ 12301(d), 12303, 12304) and suspension of retirement or separation (§ 12305).