Mo. Rev. Stat. § 342.020
Any incorporated association of qualified local steam engineers in any city as mentioned in section 342.010 shall be authorized to grant certificates of qualification to all persons who duly pass an examination before a committee of examiners, to be appointed by any such corporation, and are found competent to manage such steam engines, boilers and apparatus as mentioned in said section 342.010, such certificates to be signed by the examining committee, and to be issued under the signature of the president and the seal of said corporation, any such certificate to be prima facie evidence of the qualifications of the person to whom it is issued; no charge to be made for any such certificate, however, exceeding one dollar.
(RSMo 1939 § 14957)
Prior revisions: 1929 § 13764; 1919 § 10968; 1909 § 10673