(a) A person who has filed security under this subchapter is exempted from the security requirements of this subchapter and is entitled, on request, to have the comptroller return, refund, or release the security if in the judgment of the comptroller the person has for two consecutive years continuously complied with the conditions of the security filed under this subchapter.
(b) A person who received a sales tax permit or was registered as a retailer before January 1, 1974, and has not been determined to be delinquent as provided by § 151.251(b) of this code or been required to file security under this subchapter is exempted from filing security.