For all policies of insurance other than life insurance and annuities, the insurer shall maintain reserves which shall place a sound value on its liabilities under such policies and which shall not be less than the reserves according to appropriate standards set forth in regulations issued by the Commissioner and, in no event, less in the aggregate than the pro rata gross unearned premium reserve for such policies. (Added 1967, No. 344 (Adj. Sess.), § 1 (ch. 1, subch. 6, § 2).)