38 C.F.R. § 21.340
(a) General. VA may approve leaves of absence under certain conditions. During approved leaves of absence, a veteran in receipt of subsistence allowance shall be considered to be pursuing a rehabilitation program. Leave may be authorized for a veteran during a period of:
(c) Election of benefits at the chapter 30 rate. If a veteran elects to receive a subsistence allowance paid at the chapter 30 rate, the effect of absences is determined under §§ 21.7139 and 21.7154.
(Authority: 38 U.S.C. 1508(f) and 1510)
[49 FR 40814, Oct. 18, 1984, as amended at 54 FR 4285, Jan. 30, 1989; 57 FR 57109, Dec. 3, 1992]