38 C.F.R. § 21.7139
The monthly rates established in §§ 21.7136, 21.7137 and 21.7138 shall be reduced as stated in this section whenever the circumstances described in this section arise.
(a) Withdrawals and nonpunitive grades. Withdrawal from a course or receipt of a nonpunitive grade affects payments to a veteran or servicemember. VA will not pay benefits to a veteran or servicemember for pursuit of a course from which the veteran or servicemember withdraws or receives a nonpunitive grade which is not used in computing requirements for graduation unless the provisions of this paragraph are met.
(2) All of the following exist.
(iii) The veteran or servicemember submits evidence supporting the existence of mitigating circumstances within one year of the date that evidence is requested by VA, or at a later date if the veteran or servicemember is able to show good cause why the one-year time limit should be extended to the date on which he or she submitted the evidence supporting the existence of mitigating circumstances.
(Authority: 38 U.S.C. 3034, 3680(a); Pub. L. 98-525, Pub. L. 102-127)(Aug. 1, 1990)
(b) No educational assistance for some incarcerated veterans or servicemembers. VA will pay no educational assistance to a veteran or servicemember, who—
(2) Is enrolled in a course—
(3) Is incurring no charge for the books, supplies and equipment necessary for the course.
(Authority: 38 U.S.C. 3034, 3482(g))
(c) Reduced educational assistance for some incarcerated servicemembers.
(1) VA will pay reduced educational assistance to a servicemember who—
(2) The monthly rate of educational assistance payable to a servicemember described in this paragraph shall equal the lowest of the following:
(iii) The monthly rate found in § 21.7136(e) or § 21.7137(c), as appropriate.
(Authority: 38 U.S.C. 3034, 3482(g))
(d) Reduced educational assistance for some incarcerated veterans.
(1) VA will pay reduced educational assistance to a veteran who—
(2) The monthly rate of educational assistance payable to such a veteran who is pursuing the course on a one-half time or greater basis shall be the lesser of the following:
(3) The monthly rate of educational assistance payable to such a veteran who is pursuing the course on a less than one-half time basis or on a one-quarter time basis shall be the lowest of the following:
(iii) The monthly rate determined by § 21.7136(e) or § 21.7137(b), as appropriate, plus the monthly rate stated in § 21.7138(c) if the veteran is entitled to supplemental educational assistance.
(Authority: 38 U.S.C. 3034, 3482(g))
(e) Payment for correspondence courses. The amount of payment due a veteran or servicemember who is pursuing a correspondence course or the correspondence portion of a correspondence-residence course is 55 percent of the established charge which the educational institution requires nonveterans to pay for the lessons that the veteran or servicemember has had completed and serviced and for which payment is due.
(Authority: 38 U.S.C. 3034, 3686(a)(2))
(f) Failure to work sufficient hours of apprenticeship and other on-job training.
(1) For any month in which an eligible veteran pursuing an apprenticeship or other on-job training program fails to complete 120 hours of training, VA will reduce proportionally—
(3) For the purpose of this paragraph “hours worked” include only—
(ii) All hours of the veteran's related training which occurred during the standard workweek and for which the veteran received wages. (See § 21.4270(c), footnote 5, as to the requirements for full-time training.)
(Authority: 38 U.S.C. 3034, 3687(b)(3)
[53 FR 1757, Jan. 22, 1988, as amended at 55 FR 28388, July 11, 1990; 56 FR 11672, Mar. 20, 1991; 57 FR 15025, Apr. 24, 1992; 58 FR 26242, May 3, 1993; 60 FR 32272, June 21, 1995; 62 FR 55520, Oct. 27, 1997; 71 FR 75678, Dec. 18, 2006; 73 FR 65269, Nov. 3, 2008]