WVC 46 - 2 A- 205
§46-2A-205. Firm offers.
An offer by a merchant to lease goods to or from another
person in a signed writing that by its terms gives assurance 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 the period of irrevocability exceed three
months. Any such term of assurance on a form supplied by the
offeree must be separately signed by the offeror.