(A) A non-conforming building may be enlarged or extended only if the entire building is thereafter devoted to a conforming use, and is made to conforming use, and is made to conform to all the regulations of the district in which it is located, except as provided in § 159.147 of this chapter;
(B) No building partially occupied by a non-conforming use shall be altered in such a way as to permit the enlargement or expansion of the space occupied by the non-conforming use, except as provided in § 159.147 of this chapter;
(C) No non-conforming use may be enlarged or extended in such a way as to occupy any required usable open space, or any land beyond the boundaries of the zoning lot as it existed on the effective date of this chapter, or to displace any conforming use in the same building or on some parcel of land, except as provided in § 159.147 of this chapter; and
(D) A building or structure which is non-conforming with respect to yards, floor area ratio, or any other element of bulk, shall not be altered or expanded in any manner which would increase the degree or extent of its non- conformity with respect to the bulk regulations for the district in which it is located, except as provided in § 159.147 of this chapter.