§12A-2-612.

§12A-2-612.
   
   (1) An "installment contract" is one which requires or authorizes the
   delivery of goods in separate lots to be separately accepted, even
   though the contract contains a clause "each delivery is a separate
   contract" or its equivalent.
   
   (2) The buyer may reject any installment which is nonconforming if the
   nonconformity substantially impairs the value of that installment and
   cannot be cured or if the nonconformity is a defect in the required
   documents; but if the nonconformity does not fall within subsection
   (3) and the seller gives adequate assurance of its cure the buyer must
   accept that installment.
   
   (3) Whenever nonconformity or default with respect to one or more
   installments substantially impairs the value of the whole contract
   there is a breach of the whole. But the aggrieved party reinstates the
   contract if he accepts a nonconforming installment without seasonably
   notifying of cancellation or if he brings an action with respect only
   to past installments or demands performance as to future installments.