Mo. Rev. Stat. § 701.357: Codes adoption by political subdivisions to be more stringent than certain other American codes.

Any code adopted pursuant to section 701.355 shall be equal to or more stringent than the standards provided for in the following:

(1) American Society of Mechanical Engineers Safety Code for Elevators and Escalators ANSI/ASME A17.1;

(2) American National Standard Practice for the Inspection of Elevators, Escalators and Moving Walks ANSI A17.2;

(3) American National Standard Safety Code for Manlifts ANSI A90.1; and

(4) American National Standard Safety Requirements for Personnel Hoist ANSI A10.4.