SMC R-1 requires veterans to first qualify for SMC (o) or SMC (p), which typically means having two separate service-connected conditions that each independently rate between SMC (L) and SMC (N).
Under 38 U.S.C. § 1114(r)(1), if at least one of those qualifying conditions involves the need for regular Aid and Attendance, the veteran advances to R-1. Aid and Attendan...