48 C.F.R. §§ 52.232-3
As prescribed in 32.111(a)(3), insert the following clause, appropriately modified with respect to payment due dates in accordance with agency regulations, in solicitations and contracts for personal services:
Payments Under Personal Services Contracts (APR 1984)
The Government shall pay the Contractor for the services performed by the Contractor, as set forth in the Schedule of this contract, at the rates prescribed, upon the submission by the Contractor of proper invoices or time statements to the office or officer designated and at the time provided for in this contract. The Government shall also pay the Contractor (a) a per diem rate in lieu of subsistence for each day the Contractor is in a travel status away from home or regular place of employment in accordance with Federal Travel Regulations ( 41 CFR 101-7 ) as authorized in appropriate Travel Orders; and (b) any other transportation expenses if provided for in the Schedule.
(End of clause)
48 C.F.R. §§52.232-3