No person, firm or corporation, who shall represent the county, city, town, board of education, school district, or other subdivision of the State of Oklahoma, in the preparation or handling of such bond issue, or the proceedings incident thereto, in any manner, shall be permitted to bid for or become the purchaser of such bonds upon sale thereof, or be interested in any bid submitted at the sale of said bonds, and no bidder shall be interested in any proceedings contract.
Okla. Stat. tit. 62, § 355