(a) As the Contractor represented in its offer, any item, including any item delivered under subcontract; any service; or any combination thereof delivered under this contract is fully exempt from the 2-percent excise tax withholding imposed by 26 U.S.C. 5000C and implemented by Federal Acquisition Regulation (FAR) 52.229-12, Tax on Certain Foreign Procurements.

(b) If the full exemption no longer applies due to a change in circumstances during the performance of the contract, causing the Contractor to become subject to the withholding for the 2-percent excise tax as imposed by 26 U.S.C. 5000C, then the Contractor shall immediately comply with the notification and billing requirements of FAR clause 52.229-12.