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Contracts do not include grants and cooperative agreements.
Bids are normally not negotiated and cannot be changed once accepted by the owner.
It includes all types of commitments that obligate the Government to an expenditure of appropriated funds and that, except as otherwise authorized, are in writing.
In addition to bilateral instruments, contracts include (but are not limited to) awards and notices of awards; job orders or task letters issued under basic ordering agreements; letter contracts; orders, such as purchase orders, under which the contract becomes effective by written acceptance or performance; and bilateral contract modifications.
Contracting includes description (but not determination) of supplies and services required selection and solicitation of sources, preparation and award of contracts, and all phases of contract administration.
It does not include making grants or cooperative agreements.
Control may arise through ownership, management, or other relationships or interactions between the parties.