(A)   Any repairs, alteration, and additions necessary for preservation or continued use may be made without conformance to the requirements of this chapter with authorization from the Board of Commissioners.
   (B)   Board of Commissioners authorization is conditional upon the following:
      (1)   Completion of all requirements of SDCL § 1-19A-11.1;
      (2)   The building or area having been designated by action of the legally constituted authority of the jurisdiction as having special historical or architectural significance;
      (3)   Any unsafe conditions are corrected; and
      (4)   The restored building or area will not be more hazardous, based on life, safety, fire safety, and sanitation regulations, than the existing construction.