Mo. Rev. Stat. § 40.214

Upon review of the record of trial by general court-martial in which there has been a finding of guilty and a sentence and upon review of the record of trial by special court-martial in which the sentence as approved by an officer exercising general court-martial jurisdiction includes a bad conduct discharge, the accused shall have the right to be represented before the state judge advocate or the board of review, as the case may be, by military counsel if requested by him or by civilian counsel if provided by him. Appellate military counsel shall be a commissioned officer of the state military forces and shall be a member of the Missouri Bar.