No association shall conduct any harness horse race meet except at the location designated in the license awarded by the Commission provided, however, that this restriction shall not apply to any association whose plant or the usefulness thereof or of any material part thereof be totally destroyed or so substantially damaged as to render it unfit for continued operation in which case, the Commission may in its discretion permit the association to conduct its meetings at another suitable location in the same county or in any other county in which a plant may be located pending the rebuilding or restoration of the plant so destroyed or damaged.
58 Pa. Code § 185.12