Missouri Revised Statutes Title XLI. Codes and Standards § 700.656. Installers to be licensed by the commission--no local license required--certain entities to employ licensed installers--license not required, when

1. No person shall engage in the business of installing manufactured homes or hold himself or herself out as a manufactured home installer in this state unless such person holds a valid installer license issued by the commission pursuant to sections 700.650 to 700.680.

2. The installer license obtained from the commission shall be the only installer license required for installing manufactured homes within this state. No political subdivision of this state may issue an installer license or require additional professional licensure of installers already licensed by the commission.

3. Manufactured home dealers and manufactured home manufacturers who do not subcontract with a licensed installer and who perform installations themselves or through direct agents or employees shall have at least one agent or employee who is a licensed installer.

4. Any corporation, partnership, or other legal entity that performs installation shall have at least one supervising agent who is a licensed installer.

5. A license to install manufactured homes is not required for a person who installs a manufactured home on his or her property for his or her own occupancy or who is a direct agent of a licensee, working under the licensee's supervision and within the licensee's job scope. The licensed installer is responsible for supervising all such agents for their competent and proper performance.