Mo. Rev. Stat. § 379.116: Refusal to insure or exclusion of named persons, when.

Any insurer may at any time refuse to write a policy of automobile insurance or may cancel or refuse to renew such a policy if the operator's or chauffeur's license of the applicant or named insured has been suspended or revoked. If the operator's or chauffeur's license of any member of a policyholder's household has been suspended or revoked, an insurer may issue an exclusion providing, by name, that coverage will not be provided under the terms of the policy while such person is operating the insured vehicle during any period of suspension or revocation.