Mo. Rev. Stat. § 40.225: Sentence, unexecuted portion — powers to remit or suspend, exception — discharge or dismissal ordered by governor, when.

1. A convening authority may remit or suspend any part or amount of the unexecuted part of any sentence, including all uncollected forfeitures, other than a sentence approved by the governor.

2. The governor may, for good cause, substitute an administrative form of discharge for a discharge or dismissal executed in accordance with the sentence of a court-martial.