Mo. Rev. Stat. § 40.216: Sentence approval by governor required, when — governor's powers — sentence approval by convening authority, powers.

1. No sentence extending to the dismissal of a commissioned officer or dishonorable discharge or bad conduct discharge shall be executed until approved by the governor. He shall approve the sentence or such part, amount, or commuted form of the sentence as he sees fit, and may suspend the execution of the sentence or any part of the sentence, as approved by him.

2. All other court-martial sentences, unless suspended, may be ordered executed by the convening authority when approved by him. The convening authority may suspend the execution of any sentence.