All public construction contracts shall be let and awarded to the lowest responsible bidder, by free and open competitive bidding after solicitation for sealed bids, in accordance with the provisions of this act. No work shall be commenced until a written contract is executed and all required bonds and insurance have been provided by the contractor to the awarding public agency.

Laws 1974, HB 1665, c. 298, § 3, emerg. eff. August 1, 1974; Amended by Laws 1975, HB 1251, c. 266, § 2, emerg. eff. June 5, 1975.