(a) Performance by subcontractor entitles subcontractor to payment.--Performance by a subcontractor in accordance with the provisions of the contract shall entitle the subcontractor to payment from the party with whom the subcontractor has contracted. For purposes of this section, the contract between the contractor and subcontractor is presumed to incorporate the terms of the contract between the contractor and the government agency.

(b) Disclosure of progress payment due dates.--A contractor or subcontractor shall disclose to a subcontractor, before a subcontract is executed, the due date for receipt of progress payments from the government agency. Notwithstanding any other provisions of this subchapter, if a contractor or a subcontractor fails to accurately disclose the due date to a subcontractor, the contractor or subcontractor shall be obligated to pay the subcontractor as though the due dates established in subsection (c) were met by the government agency. This subsection shall not apply to a change in due dates because of conditions outside of the contractor's control, including, but not limited to, design changes, change orders or delays in construction due to weather conditions.

(c) Payment.--When a subcontractor has performed in accordance with the provisions of the contract, a contractor shall pay to the subcontractor, and each subcontractor shall in turn pay to its subcontractors, the full or proportional amount received for each such subcontractor's work and material, based on work completed or services provided under the subcontract, 14 days after receipt of a progress payment. Payment shall be made under this section unless it is being withheld under section 3934 (relating to withholding of payment for good faith claims).

(d) Interest due when progress payment not timely.--If any progress payment is not made to a subcontractor by the due date established in the contract or in subsection (c), the contractor shall pay to the subcontractor, in addition to the amount due, interest as computed in section 3932(c) (relating to government agency's progress payment obligations).

(e) When interest payment not required.--In the event that the contract does not contain a grace period and if a subcontractor is not paid by the payment date required by subsection (c), no interest penalty payment required under this section shall be paid if payment is made on or before the 15th calendar day after the payment date required under this subchapter.