Okla. Stat. tit. 61, § 115

Any agreement or collusion among bidders, prospective bidders or material suppliers in restraint of freedom of competition by agreement to bid at a fixed price or to refrain from bidding, or otherwise, shall render the bids of such bidders void. Persons willfully violating this section shall be guilty of a Class D1 felony offense and shall be punished by imprisonment as provided for in subsections B through F of Section 20N of Title 21 of the Oklahoma Statutes. Each bidder shall accompany the bid with a sworn statement that the bidder has not been a party to any such agreement. The form of the statement shall be substantially as provided in Section 85.22 of Title 74 of the Oklahoma Statutes, but modified in wording to refer to the appropriate public agency requesting bids.