38 C.F.R. § 21.5071
(a) Entitlement based on monthly contributions. The Department of Veterans Affairs will credit an individual with 1 month of entitlement for each month he or she contributes to the fund up to a maximum of 36 months or its equivalent in part-time training.
(Authority: 38 U.S.C. 3231)
(b) Entitlement based on lump-sum contributions. If an individual elects to make a lump-sum contribution, the Department of Veterans Affairs will credit an individual with 1 month of entitlement for:
(2) Every amount included in the lump sum which:
(iii) Is specifically designated by the individual at the time he or she makes the contribution.
(Authority: 38 U.S.C. 3222(d))
(c) Entitlement based on both monthly and lump-sum contributions.
(1) If the individual makes both monthly and lump-sum contributions, the Department of Veterans Affairs will:
(2) In no event will an individual's entitlement exceed 36 months or its equivalent in part-time training.
(Authority: 38 U.S.C. 3222(d), 3231)
[47 FR 51745, Nov. 17, 1982, as amended at 48 FR 50530, Nov. 2, 1983]