Okla. Stat. tit. 12A, § 12A-2-306: Output, Requirements and Exclusive Dealings

(1) A term which measures the quantity by the output of the

seller or the requirements of the buyer means such actual output or

requirements as may occur in good faith, except that no quantity

unreasonably disproportionate to any stated estimate or in the

absence of a stated estimate to any normal or otherwise comparable

prior output or requirements may be tendered or demanded.

(2) A lawful agreement by either the seller or the buyer for

exclusive dealing in the kind of goods concerned imposes unless

otherwise agreed an obligation by the seller to use best efforts to

supply the goods and by the buyer to use best efforts to promote

their sale.