41 C.F.R. § 105-72.304 – Program income.

(a) Federal awarding agencies shall apply the standards set forth in this section in requiring recipient organizations to account for program income related to projects financed in whole or in part with Federal funds.
(b) Except as provided in paragraph (h) of this section, program income earned during the project period shall be retained by the recipient and, in accordance with Federal awarding agency regulations or the terms and conditions of the award, shall be used in one or more of the ways listed in the following.
1. (1) Added to funds committed to the project by the Federal awarding agency and recipient and used to further eligible project or program objectives.
2. (2) Used to finance the non-Federal share of the project or program.
3. (3) Deducted from the total project or program allowable cost in determining the net allowable costs on which the Federal share of costs is based.
(c) When an agency authorizes the disposition of program income as described in paragraphs (b)(1) or (b)(2), program income in excess of any limits stipulated shall be used in accordance with paragraph (b)(3).
(d) In the event that the Federal awarding agency does not specify in its regulations or the terms and conditions of the award how program income is to be used, paragraph (b)(3) shall apply automatically to all projects or programs except research. For awards that support research, paragraph (b)(1) shall apply automatically unless the awarding agency indicates in the terms and conditions another alternative on the award or the recipient is subject to special award conditions, as indicated in § 105-72.204.
(e) Unless Federal awarding agency regulations or the terms and conditions of the award provide otherwise, recipients shall have no obligation to the Federal Government regarding program income earned after the end of the project period.
(f) If authorized by Federal awarding agency regulations or the terms and conditions of the award, costs incident to the generation of program income may be deducted from gross income to determine program income, provided these costs have not been charged to the award.
(g) Proceeds from the sale of property shall be handled in accordance with the requirements of the Property Standards (See §§ 105-72.400 through 105-72.407).
(h) Unless Federal awarding agency regulations or the terms and condition of the award provide otherwise, recipients shall have no obligation to the Federal Government with respect to program income earned from license fees and royalties for copyrighted material, patents, patent applications, trademarks, and inventions produced under an award. However, Patent and Trademark Amendments (35 U.S.C. 18) apply to inventions made under an experimental, developmental, or research award.