No premises or structure shall be occupied or used and no structure or any part thereof shall be constructed, altered, extended, enlarged, moved, placed or maintained except in conformity with the policies of the general plan and the regulations of the zone in which it is located. No buildings shall be occupied by more families than prescribed for such building, structure or premises for the zone in which it is located. No yard or other open space, or part thereof, shall be included as part of a yard or other open space for any other building or structure, or for any other lot. No yard or open space shall be used, encroached upon or reduced, except in conformity with the regulations for the particular zone in which it is located. No lot area shall be so reduced or diminished that the yards and open space shall be smaller than as is prescribed by this Title. (Ord. 89-1 § 1, 1989.)