All contracts for the construction of turnpikes shall be let by the Authority to the lowest responsible bidder, or bidders, after notice by publication in the same manner as provided in Section 1101 of this Code, provided, the Authority may reject all bids and readvertise the same. Furthermore, the Authority shall retain five percent (5%) of the total amount of money due under contract with the Authority for payment of taxes and providing of workers' compensation insurance as provided in Section 1103 of this Code.
Okla. Stat. tit. 69, § 1731