Mo. Rev. Stat. § 303.140
The license and registration and nonresident's operating privilege suspended as provided in section 303.030 shall remain suspended and shall not be renewed nor shall a license or registration be issued to the person until:
(3) Evidence satisfactory to the director is filed with him of a release from liability, or a final adjudication of nonliability, or a duly acknowledged written agreement, in accordance with subdivision (3) of section 303.070; but if there is any default in the payment of any installment under any duly acknowledged written agreement, then, upon notice of the default, the director shall forthwith suspend the license and registration or nonresident's operating privilege of the person defaulting which shall not be restored unless and until:
(L. 1953 p. 569 § 303.070, A.L. 1961 p. 494, A.L. 1965 p. 95, A.L. 1986 S.B. 424)
Effective 7-01-87