Okla. Stat. tit. 47, § 230.33

A. The provisions of the Motor Carrier Act of 1995 shall not apply to persons who operate motor vehicles in excess of twenty-six thousand (26,000) pounds who have contracted or subcontracted with any federal, state or local entity to conduct activities associated with the building or maintenance of streets, roads, bridges, turnpikes or any other project associated with road building. B. Provided however, any person, contractor, or subcontractor who operates a motor vehicle in excess of twenty-six thousand (26,000) pounds in the furtherance of any contract let by any federal, state or local entity for the building or maintenance of roads, bridges, turnpikes or any other projects associated with road building shall obtain an annual policy for motor vehicle insurance or general liability insurance in an amount equal to or greater than Three Hundred Fifty Thousand Dollars ($350,000.00).