The compensation of state, county and municipal officers shall not be increased during the term of office; nor shall the term of any officer be extended.
Mo. Const. art. VII, § 13 — under Public Officers.
Mo. Const. art. VII, § 13
Limitation on increase of compensation and extension of terms of office
The compensation of state, county and municipal officers shall not be increased during the term of office; nor shall the term of any officer be extended.