38 C.F.R. § 21.5744
(a) Charges against entitlement to educational assistance.
(1) Except as provided in paragraph (a)(2) of this section VA will make a charge against an individual's entitlement to educational assistance of—
(i) One month for each month of a term, quarter or semester—
(ii) One-half month for each month of a term, quarter or semester—
(2) VA will prorate the entitlement charge if the individual—
(b) Charges against entitlement to subsistence allowance.
(1) For each individual, except servicemembers, VA will make a charge against an individual's entitlement to subsistence allowance of—
(2) Even though a servicemember may not receive subsistence allowance, VA will make a charge against a servicemember's entitlement to subsistence allowance of—
(i) One month for each month of a term, quarter or semester—
(ii) One-half month for each month of a term, quarter or semester—
(3) VA will prorate the entitlement charge as stated in paragraph (b) (1) or (2) of this section during any month for which a servicemember receives educational assistance or for which the individual receives subsistence allowance—
(ii) At the full-time rate for part of a month and at the part-time rate for part of the same month.
(Authority: 10 U.S.C. 2142)