14 C.F.R. § 1260.68 Invoices and payments under grants with commercial firms.
Title 14 - Aeronautics and Space
Invoices and Payments Under Grants With Commercial Firms October 2000 (a) Invoices for payment of actual incurred costs shall be submitted by the Recipient no more frequently than on a___basis. (b) Invoices shall be submitted by the Recipient to the following offices: (1) The original invoice shall be sent directly to the payment office designated on the grant cover page. (2) Copies of the invoice shall be sent to the NASA Technical Officer and NASA Grant Officer. (c) All invoices shall reference the grant number. (d) The final invoice shall be marked “Final” and shall be submitted within 90 days of the expiration of the grant. (e) The requirements set forth in this special condition supercedes grant provision 1260.26, Financial Management.
Title 14: Aeronautics and Space
PART 1260—GRANTS AND COOPERATIVE AGREEMENTS
Subpart A—General
Special Conditions
§ 1260.68 Invoices and payments under grants with commercial firms.

