Mo. Rev. Stat. § 559.311
The board shall have power to make all needed rules and regulations concerning terms and conditions of parole and applications for parole as herein provided, but no formal or technical form of application therefor shall be required. The board so constituted shall hold regular meetings at least once in each week and more often if they shall deem it necessary, and all records, hearings and proceedings of the board shall be public and open to the inspection of the public. Whenever either of the members of the board of parole from any cause shall be unable to be present at any meeting or meetings of the board the attorneys of the court who are present but not less in number than five may elect one of its members then in attendance having the qualifications of a circuit judge to act as a temporary member of the board in the place of the member who is absent and the attorney together with the regular member of the board who is present shall have power to hear and determine all applications for parole.
§ 559.311, RSMo