Section 1010 of the National Defense Authorization Act for Fiscal Year 2001 (Public Law 106-398 , 114 Stat. 1654), as amended by section 1007 of the National Defense Authorization Act for Fiscal Year 2002 (Public Law 107-107 , 115 Stat. 1012), requires an agency to pay an interest penalty whenever the agency makes an interim payment under a cost-reimbursement contract for services more than 30 days after the date the agency receives a proper invoice for payment from the contractor. This part implements Section 1010, as amended, and is applicable in the following manner:
5 C.F.R. §1315.20