No application for site plan approval shall be accepted for filing nor be processed and no building, site clearance, or grading permit shall be issued for any work, other than in connection with a single family residential use, for a period not to exceed 90 days, on land which is being considered for a change in zoning classification, such 90-day period to begin on the date the City Council submits the proposed zoning change to the Zoning Commission for a report and recommendation. Properties which have received preliminary or final site plan approval prior to such date are excepted.