Section 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.