Contract review: 52.248-1��Value Engineering.

52.248-1��Value Engineering.: "If the contract is terminated for the convenience of the Government, the settlement shall include a percentage of the fee equal to the percentage of completion of work contemplated under the contract, but excluding subcontract effort included in subcontractors’ termination settlement proposals, less previous payments for fee."

This is an excellent document describing when and where to use various types of clauses in contracts
more: https://www.acquisition.gov/