Tenn. Code Ann. § 56-43-109: Reserves

(a) An insurer must maintain the reserves necessary for the sound operation of the business, including unearned premium reserves. The amount and manner of calculating these reserves shall be determined by rule by the commissioner in accordance with § 56-43-112 .

(b) In establishing and enforcing reserve requirements, the commissioner shall prescribe and allow a reasonable phase-in period prior to mandating full compliance with the reserve requirements by any person transacting the business of legal insurance on January 1, 1990.