Section 52-22 - Structural Alterations
No structural alterations shall be made in a building or other structure substantially occupied by a non-conforming use , except when made:
in order to comply with requirements of law; or in order to accommodate a conforming use ; or in order to conform to the applicable district regulations on performance standards; or in the course of an enlargement permitted under the provisions of Section 52-40 (ENLARGEMENTS OR EXTENSIONS), inclusive; or in the course of an alteration to improve the energy performance of the building or other structure , including, but not limited to, the addition of solar energy systems, energy storage systems, or qualifying exterior wall thickness ; or except as set forth in Section 52-80 (REGULATIONS APPLYING TO NON-CONFORMING SIGNS), inclusive.