This regulation- a.Prescribes eligibility criteria governing the enlistment of persons, with or without prior Service (PS), into the Regular Army (RA), the Army Reserve (AR), and the Army National Guard (ARNG). b.Provides policies and procedures to process applicants for enlistment in the- (1)Regular Army Delayed Entry Program (DEP) and on delayed status (DS). (2)Army Reserve Delayed Training Program (DTP) and the DEP. (3)Delayed Training Program and DEP are not applicable to the ARNG. c.Provides policy and procedures governing the appointment, reassignment, management, and mobilization of Reserve Officers' Training Corps (ROTC) cadets under the ROTC Simultaneous Membership Program (SMP). This publication is a rapid action revision (RAR). This RAR is effective 12 March 2013. The portions affected by this RAR are listed in the summary of change. This Regulation governs eligibility criteria, policies, and procedures for enlistment and processing of persons into the Regular Army, the Army Reserve, and the Army National Guard for enlistment on or after the effective date of this regulation. It also prescribes the appointment, reassignment, management, and mobilization of Reserve Offices' Training Corps cadets under the Simultaneous Membership Program.