SDCL § 58-17A-14: Requirements for replacement of policy.

An issuer replaces a medicare supplement policy if:

(1) The issuer discontinues or does not renew a medicare supplement policy and offers an alternative medicare supplement policy to its insured; or

(2) The newer policy has an effective date which coincides with or which is within thirty days after the date the older policy covering that same insured discontinued. An issuer does not violate medicare supplement replacement requirements unless that issuer or its representative knew or reasonably should have known of the older policy.