Okla. Stat. tit. 69, § 69-630: Interest of officers in contracts prohibited

No member of the Department, or any person in the employ of the

Department, no county commissioner, county engineer, road

superintendent, or any person in their employ, or one holding an

appointment under them, shall be either directly or indirectly

interested in any contract for the construction or building of any

bridge or culvert, or of any improvement of any road or parts of

road coming under the provisions of this Code.