(a) The board of trustees of the Susie Parker Stringfellow Memorial Hospital established and created under the last will and testament of Susie P. Stringfellow, deceased, and Stringfellow Memorial Hospital Non-Profit Realty Company, a nonprofit corporation, and all real and personal property of said board of trustees or said nonprofit corporation shall be exempt from the payment of any and all state, county and municipal ad valorem taxes.
(b) Any ad valorem taxes which were, are or may be collected subsequent to May 4, 1982, as the result of any assessment against the board of trustees of the Susie Parker Stringfellow Memorial Hospital established and created under the last will and testament of Susie P. Stringfellow, deceased, or Stringfellow Memorial Hospital Non-Profit Realty Company, a nonprofit corporation, or any real or personal property of said board of trustees or said nonprofit corporation, will be remitted to the entity which paid them; and no action or proceeding against said board of trustees or said nonprofit corporation may be instituted after such date by the State of Alabama or any county or municipality thereof or any person acting on behalf of any thereof for the collection or enforcement of any such ad valorem tax.