(a) A zoning certificate shall be required for any of the following, except as herein provided:
(1) Construction or structural alteration of any building, including accessory buildings.
(2) Change in use of an existing building or accessory building to a use of a different classification.
(3) Occupancy and use of vacant land.
(4) Change in the use of land to a use of a different classification.
(5) Any change in the use of a nonconforming use.
(b) A zoning certificate shall be required for all lawful nonconforming uses of land or buildings created by adoption of this Zoning Ordinance or any amendments.