If the applicant proposes a modification to an eligible support structure, which structure, or proposed modification of the same, is subject to preexisting restrictions or requirements imposed by a reviewing official or decision-making body pursuant to authority granted under the city code, or an ordinance or a municipal code of another local government authority, the following shall be required:
A copy of the document (e.g., CUP or SUP) setting forth such preexisting restrictions or requirements together with a certification that the proposed facilities modification conforms to such restrictions or requirements; provided, that such certification shall have no application to the extent the proposed facilities modification relates solely to an increase in height, increase in width, addition of cabinets, or new excavation, that does not result in a substantial change in the physical dimensions of the eligible support structure.