When a public contract is to be awarded to the lowest responsible bidder, a resident bidder shall be allowed a preference over a nonresident bidder from a state which gives or requires a preference to bidders from that state. The preference shall be equal to the preference given or required by the state of the nonresident bidder. Resident bidder as used in sections 73-101.01 and 73-101.02 shall mean any person, partnership, foreign or domestic limited liability company, association, or foreign or domestic corporation authorized to engage in business in the State of Nebraska and which has met the residency requirement of the state of the nonresident bidder necessary for receiving the benefit of that state’s preference law on the date when any bid for a public contract is first advertised or announced or has had a bona fide establishment for doing business within this state for the length of time established by the state of the nonresident bidder necessary for receiving the benefit of that state’s preference law on the date when any bid for a public contract is first advertised or announced. Any contract entered into without compliance with sections 73-101.01 and 73-101.02 shall be null and void.