(a) If the commissioner determines that an insurer's unearned premium reserve, however computed, is inadequate, he may require the insurer to compute such reserve or any part thereof according to such other method or methods as are prescribed in this article.
(b) If the loss experience of an insurer shows that its loss reserves, however estimated, are inadequate, the commissioner shall require the insurer to maintain loss reserves in such increased amount as is needed to make them adequate.