Mo. Rev. Stat. § 328.070

The board shall hold public examinations at least four times in each year, at such times and places as it may deem advisable, notice of such examinations to be published at least ten days prior to the date of the examination. The board shall publish its notice of the examination date, place, and time in any manner that it deems appropriate. In lieu of holding its own examinations for barber applicants, the board may contract with an outside entity qualified to examine applicants for licensure.