An offer by a merchant to buy or sell goods in a signed record that 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 months; but in no event may the period of irrevocability exceed three months. Any such term of assurance in a form supplied by the offeree must be separately signed by the offeror. ONCA 13-23, eff. Sept. 24, 2013.