Nonconforming uses, structures and/or trees. The regulations prescribed by this section shall not be construed to require the removal, lowering or otherwise change to or alteration of any use, structure and/or tree identified as nonconforming to the regulations of this section as of the effective date of this chapter, or to otherwise interfere with the continuance of a nonconforming use, structure and/or tree. No nonconforming use or structure shall be altered, nor tree permitted to grow higher, so as to increase the nonconformity (relating to height and the use restrictions set forth in this section). A nonconforming use, structure or tree, once abandoned or damaged or destroyed as per to the standards in Article XV of this chapter relating to existing nonconforming uses and structures, may only be reestablished consistent with the provisions of this section and Article XV of this chapter relating to existing nonconforming uses and structures.