38 C.F.R. § 3.31
Regardless of VA regulations concerning effective dates of awards, and except as provided in paragraph (c) of this section, payment of monetary benefits based on original, supplemental, or increased awards of compensation, pension, dependency and indemnity compensation, or a monetary allowance under 38 U.S.C. chapter 18 for an individual who is a child of a Vietnam veteran or a child of a veteran with covered service in Korea may not be made for any period prior to the first day of the calendar month following the month in which the award became effective. However, beneficiaries will be deemed to be in receipt of monetary benefits during the period between the effective date of the award and the date payment commences for the purpose of all laws administered by the Department of Veterans Affairs except that nothing in this section will be construed as preventing the receipt of retired or retirement pay prior to the effective date of waiver of such pay in accordance with 38 U.S.C. 5305.
(c) Specific exclusions. The provisions of this section do not apply to the following types of awards.
(3) Adjustments of awards—such as in the case of apportionments or the termination of any withholding, reduction, or suspension by reason of:
(4) Increases resulting solely from the enactment of legislation—such as
(5) Temporary total ratings pursuant to paragraph 29 of the Schedule for Rating Disabilities when the entire period of hospitalization or treatment, including any period of post-hospitalization convalescence, commences and terminates within the same calendar month. In such cases the period of payment shall commence on the first day of the month in which the hospitalization or treatment began.
(Authority: 38 U.S.C. 1805, 1815, 1821, 1832, 5111)
[48 FR 34472, July 29, 1983; 48 FR 37031, Aug. 16, 1983, as amended at 49 FR 47003, Nov. 30, 1984; 65 FR 35282, June 2, 2000; 67 FR 49586, July 31, 2002; 76 FR 4247, Jan. 25, 2011; 84 FR 166, Jan. 18, 2019; 91 FR 905, Jan. 9, 2026]