Mo. Rev. Stat. § 329.255: Violation of law — penalty.

1. Any person:

(1) Offering to engage or engaging in the performance of any acts or practices for which a certificate of registration or authority, permit or license is required by this chapter upon a showing that such acts or practices were performed or offered to be performed without a certificate of registration or authority, permit or license; or

(2) Engaging in any practice or business authorized by a certificate of registration or authority, permit or license issued pursuant to this chapter upon a showing that the holder presents a substantial probability of serious danger to the health, safety or welfare of any resident of this state or client of the licensee.

2. Any person violating the provisions of subsection 1 or 2 of this section shall be deemed guilty of an infraction.