(1) Commencing with reports for the accounting periods beginning on or after July 1, 1983, specified disease policies shall be expected to return to policyholders in the form of aggregate loss ratios under the policy:

(a) At least seventy-five percent of the earned premiums in the case of group policies; and

(b) At least sixty percent of the earned premiums in the case of individual policies.

(2) For the purpose of this section, specified disease insurance policies issued as a result of solicitation of individuals through the mail or mass media advertising, including both print and broadcast advertising, shall be treated as individual policies.

(3) By July 1, 1983, the commissioner shall adopt rules sufficient to accomplish the provisions of this section.