§12A-2-205.

§12A-2-205.
   
   An offer by a merchant to buy or sell goods in a signed writing which
   by its terms gives assurance that it will be held open is not
   revocable, for lack of consideration, during the time stated or if no
   time is stated for a reasonable time, but in no event may such period
   of irrevocability exceed three (3) months; but any such term of
   assurance on a form supplied by the offeree must be separately signed
   by the offeror.