38 CFR §21.270

1. (a)Payment during leave. VA will pay an eligible veteran a subsistence allowance during any period of approved leave including a veteran:
   1. (1)Receiving medical or rehabilitation services on an outpatient basis at a VA medical center, and who provides his or her own room and board;
   2. (2)Receiving service department retirement or retained pay while not on active duty;
   3. (3)Hospitalized at a VA medical center while on approved leave. If the veteran becomes eligible for payment of disability compensation at the temporary 100 percent rate, under § 3.401(h) of this title due to hospitalization, payment will be made under provisions of § 21.266(a).
2. (b)Payment for other periods. Subsistence allowance will be paid for:
   1. (1)Weekend and legal holidays, or customary vacation periods associated with them;
   2. (2)Periods in which the school is closed temporarily under emergency conditions described in § 21.4138(f).