Missouri Constitution of 1945 Art. III, § 45(a). Term limitations for members of U.S. Congress--effective when--voluntary observance required, when

(1) No United States Senator from Missouri shall serve more than two terms in the United States Senate, and no United States Representative from Missouri shall serve more than four terms in the United States House of Representatives. This limitation on the number of terms shall apply to terms of office beginning on or after the effective date of this section. Any person appointed or elected to fill a vacancy in the United States Congress and who serves at least one-half of a term of office shall be considered to have served a term in that office for purposes of this subsection (1). The provisions of this subsection (1) shall become effective whenever at least one-half of the states enact term limits for their members of the United States Congress.

(2) The people of Missouri declare that the provisions of this section shall be deemed severable and that their intention is that federal officials elected from Missouri will continue voluntarily to observe the wishes of the people as stated in this section in the event any provision thereof is held invalid.