Except as hereinafter specifically provided, the following shall govern the application of regulations:
A. 
Use of land or buildings. No building shall be erected, and no existing building shall be altered, added to, or moved onto a lot, nor shall any land or building be used or arranged to be used, for any purpose other than is included among the uses listed in Article VI for the district in which it is located.
B. 
Building height. No building shall hereafter be erected or altered to exceed in height the limit designated in Article VI for the district in which it is located.
C. 
Space and area regulations. No building shall hereafter be erected, nor shall any existing buildings be altered, enlarged or moved, nor shall any open space contiguous to any building or any required parking or loading areas be encroached upon or reduced in any manner, except in conformity to the yard, lot area, building location, percentage of lot coverage, and other space and area regulations designated in said Article VI, unless such reduction or encroachment is by duly constituted authority for a public purpose.
D. 
Yard as related to building. No part of a yard or other open space as a required appurtenance to any building for the purpose of complying with the provisions of this chapter shall be included as a part of a yard or other open space required for any other building on any other lot.
E. 
Maintenance of lot size. No lot shall be reduced in area so that yards, lot area per dwelling unit, lot width or other requirements of this chapter are not maintained, unless such reduction is by duly constituted authority for a public purpose.