48 CFR § 52.232-1 - Payments.
As prescribed in 32.111(a)(1), insert the following clause, appropriately modified with respect to payment due date in accordance with agency regulations, in solicitations and contracts when a fixed-price supply contract, a fixed-price service contract, or a contract for nonregulated communication services is contemplated:
The Government shall pay the Contractor, upon the submission of proper invoices or vouchers, the prices stipulated in this contract for supplies delivered and accepted or services rendered and accepted, less any deductions provided in this contract. Unless otherwise specified in this contract, payment shall be made on partial deliveries accepted by the Government if -
(a) The amount due on the deliveries warrants it; or
(b) The Contractor requests it and the amount due on the deliveries is at least $1,000 or 50 percent of the total contract price.