Any changes to the terms or conditions of approval of the special use shall require separate review and approval by the Zoning Board of Adjustment. Any application for approval of such a change shall be filed, processed, reviewed, and approved or denied in the manner set forth in this section for an original application for special use approval. This section shall not apply, however, to modifications to the approved development plan for the special use, which are governed by Section 3.9 of this Ordinance.