§ 34.1-2-205 — Firm offers

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.