48 CFR 832.404: 832.404 Exclusions.

(b)(1) As permitted by 31 U.S.C. 3324(d)(2), VA allows advance payment for subscriptions or other charges for newspapers, magazines, periodicals, and other publications for official use, notwithstanding the provisions of 31 U.S.C. 3324(a). The term “other publications” includes any publication printed, microfilmed, photocopied or magnetically or otherwise recorded for auditory or visual use.

(2) As permitted by 31 U.S.C. 1535, VA allows advance payment for services and supplies obtained from another Government agency.

(3) As permitted by 5 U.S.C. 4109, VA allows advance payment for all or any part of the necessary expenses for training Government employees, including obtaining professional credentials under 5 U.S.C. 5757, in Government or non-Government facilities, including the purchase or rental of books, materials, and supplies or services directly related to the training of a Government employee.