Missouri constitution
article XII: amending the constitution
Section 5

All rights, claims, causes of action and obligations existing and all contracts, prosecutions, recognizances and other instruments
executed or entered into and all indictments which shall have been found and informations which shall have been filed and all actions which shall have been instituted and all fines, taxes, penalties and forfeitures assessed, levied, due or owing prior to the adoption of this constitution shall continue to be as valid as if this constitution had not been adopted.