For all taxable years commencing after December 31, 1991, the Strother field airport commission shall be exempt from the payment of ad valorem taxes levied by the state and any other political or taxing subdivision of the state on property owned by it prior to and on January 1, 1992. All property taxes, including any penalties and interest accrued thereon, imposed upon any property herein described for all taxable years commencing prior to January 1, 1992, are hereby declared to be cancelled but any such amounts paid in any such year shall not be refunded.