Missouri constitution
Article V: judicial department
Section 12

The opinions of the supreme court and court of appeals and all divisions
or districts of said courts shall be in writing and filed in the respective causes, and
shall become a part of the records of the court, be available for publication, and shall
be public records. The supreme court and the court of appeals may issue memorandum
decisions or dispose of a cause by order pursuant to and as authorized by supreme court
rule.