Mo. Rev. Stat. § 644.091: State or its subdivisions not to contract with violator.

1. No officer, agency or department of the state government, or of any political subdivision of this state shall enter into a contract with any person required to apply for a permit under the provisions of section 644.051 unless such person has applied for or received a permit pursuant to section 644.061.

2. No contract shall be entered into by any such governmental authority with any person who is held in contempt of any court order enforcing the provisions of sections 644.006 to 644.141.