Also, since this is a CPFF contract the invoices are submitted to DCAA after they have been approved by the COR. It is designated in the contract that invoices are to be submitted to the KO and the COR. Per the FAR the definition of designated billing office is the office or person designated in the contract where the contractor first submits invoices.

The Prompt Payment Act states: 'The due date for making invoice payments by the designated payment office shall be the later of the following two events: (A) The 30th day after the designated billing office receives a proper invoice from the Contractor (except as provided in paragraph (a)(1)(ii) of this clause) (B ) The 30th day after Government acceptance of supplies delivered or services performed'. My basic question is: What date should be used to determine when the 30-day clock starts for invoice payment? I have a CPFF contract that includes the Prompt Payment Clause and it also includes a local clause with the language 'In accordance with the Prompt Payment Act (FAR 52.232-25), payment will normally be made within thirty (30) days after receipt of proper invoice or acceptance of supplies/services, whichever is later'.

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