Cadet Command Reg 145-1...I think it might be in there, or in AR 145-1.
AR 145-1: "Four-year Senior Reserve Officers’ Training Corps Program
Consists of the on-campus basic course (MS I and MS II) or one of the following as a substitute for the basic course:
prior service, 3 years of JROTC, on-campus summer compression, or basic training as a member of the reserve
components. The basic course or its equivalent is then followed by the on-campus advanced course."