a) Uses established by Special Exception are considered "permitted uses" and as such are not to be viewed as "nonconforming uses."
b) A use established by Special Exception may be continued indefinitely as long as the facts and circumstances of the use remain consistent with those presented to the Zoning Hearing Board at the time the Special Exception was approved.
c) The expansion of a use established by Special Exception requires a new approval of a Special Exception based on the new facts and circumstances.