Mo. Rev. Stat. § 34.076

34.076. Out-of-state contractors or products for public works, requirements, exceptions. — 1. To the extent permitted by federal laws and regulations, whenever the state of Missouri, or any department, agency or institution thereof or any political subdivision shall let for bid any contract to a contractor for any public works or product, the contractor or bidder domiciled outside the boundaries of the state of Missouri shall be required, in order to be successful, to submit a bid the same percent less than the lowest bid submitted by a responsible contractor or bidder domiciled in Missouri as would be required for such a Missouri domiciled contractor or bidder to succeed over the bidding contractor or bidder domiciled outside Missouri on a like contract or bid being let in the person's domiciliary state and, further, the contractor or bidder domiciled outside the boundaries of Missouri shall be required to submit an audited financial statement as would be required of a Missouri domiciled contractor or bidder on a like contract or bid being let in the domiciliary state of that contractor or bidder.

2. Subsection 1 of this section shall not apply to any contractor who is qualified for bidding purposes with the department of transportation and submits a successful bid wherein part of or all funds are furnished by the United States.

3. Subsection 1 of this section shall not apply to any public works or product transportation where the bid is less than five thousand dollars.

(L. 1983 H.B. 22 § 2, A.L. 1995 H.B. 562)