Required. No vacant land shall be occupied or used, except for agricultural purposes, and no building shall be hereafter erected, structurally altered, relocated, used or occupied until a zoning permit and/or occupancy permit has been issued certifying that any such building, use, or occupancy complies with the provisions of this chapter. Like permits shall be obtained before any change is made in the type of use; before any legal nonconforming use is resumed, changed, extended, or granted conditional use status; and for any new fence, retaining wall, driveway (including gravel and impervious surface additions, patios, etc.), structures not requiring official building permits from the Building Inspection Division but still required to follow zoning requirements herein, and miscellaneous screening devices. (Determination of what screening device needs a permit is solely up to the Public Works and Development Department. Examples include carports, tents, etc.) Items such as fences, retaining walls, driveways, and miscellaneous screening devices must follow the basic location and architectural requirements set forth within the applicable Muskego ordinances.