The contractor hereby certifies that costs for work to be performed under this contract and any subcontract hereunder are not duplicative of any costs charged against any other Government contract, subcontract, or other Government source. The contractor agrees to advise the Contracting Officer, in writing, of any other Government contract or subcontract it has performed or is performing which involves work directly related to the purpose of this contract. The contractor also certifies and agrees that any and all work performed under this contract shall be directly and exclusively for the use and benefit of the Government, and not incidental to any other work, pursuit, research, or purpose of the contractor, whose responsibility it will be to account for it accordingly.