UCC § 2-601
Buyer's Rights on Improper Delivery.
Subject to the provisions of this Article on breach in installment contracts ([UCC § 2-612]) and unless otherwise agreed under the sections on contractual limitations of remedy ([UCC § 2-718 and UCC § 2-719]), if the goods or the tender of delivery fail in any respect to conform to the contract, the buyer may
- reject the whole; or
- accept the whole; or
- accept any commercial unit or units and reject the rest.
. . .
- . . . Partial acceptance is permitted whether the part of the goods accepted conforms or not. The only limitation on partial acceptance is that good faith and commercial reasonableness must be used to avoid undue impairment of the value of the remaining portion of the goods. . . . In this respect, the test is not only what unit has been the basis of contract, but whether the partial acceptance produces so materially adverse an effect on the remainder as to constitute bad faith.