Mo. Rev. Stat. § 342.010
No person shall be authorized to manage, control or take charge of or act as engineer of any steam boiler, engine or apparatus, in any city in the state of Missouri having over twenty thousand inhabitants, who has not the requisite knowledge and ability to manage the same with safety to the lives and property of the inhabitants of such cities. No person shall be authorized to act as inspector of stationary steam engines, boilers or apparatus in any of the cities mentioned in this section who has not the qualifications herein mentioned. Any person who shall manage, control or take charge of or act as engineer of any steam boiler, engine or apparatus as indicated in this section, who shall not be a duly qualified engineer, shall be deemed to be guilty of a misdemeanor, and on conviction shall be fined not less than ten nor more than five hundred dollars.
(RSMo 1939 § 14956)
Prior revisions: 1929 § 13763; 1919 § 10967; 1909 § 10672