Mo. Rev. Stat. § 173.380

Any other provision of the law to the contrary notwithstanding, it shall not be or constitute a conflict of interest for a trustee, director, officer, or employee of any educational institution, financial institution, investment banking firm, brokerage firm, commercial bank or trust company, or any other firm, person, or corporation to serve as a member of the authority, provided such trustee, director, officer, or employee shall abstain from deliberation, action, and vote by the authority in each instance where the business affiliation of * any such trustee, director, officer, or employee is involved.