Mo. Rev. Stat. § 287.450
If the employer and employee or his dependents do not agree in regard to compensation payable under this chapter, either party may make application in a manner determined by the division for a hearing in regard to the matters at issue and for a ruling thereon, except that no application for a hearing shall be considered until fourteen days after the receipt by the division of the report of accident required under section 287.380. The fourteen-day waiting period is not applicable to applications for hardship hearings. After the application has been received, the division shall set a date for a hearing, which shall be held as soon as practicable, and shall notify the interested parties of the time and place of the hearing.
§ 287.450, RSMo
RSMo 1939 § 3728, A.L. 1947 V. II p. 447, A.L. 1965 p. 397, A.L. 1992 H.B. 975, A.L. 2012 H.B. 1540