Bids may be modified or withdrawn up to the time set for bid opening. Modification notices or withdrawal instructions may be sent by registered mail, delivered in person, or sent electronically. Appropriate identification reflecting the authority of the bearer to modify or withdraw a bid must be presented. A bid to be withdrawn shall not be opened and shall be returned upon request of the bidder at the conclusion of the bid opening.
Okla. Admin. Code § 752:11-7-4