Except as otherwise provided in this section, the lawful use of land existing at the date of the adoption of this Chapter may be continued although such use does not conform to the regulations specified by this Chapter for the zoning district in which such land, buildings or structures are located, provided, however, that no existing land, buildings, or structure devoted to a use not permitted in this Chapter in the district in which such lands, buildings or structures are located, shall be enlarged, extended, constructed, reconstructed, substituted, relocated, erected, converted to another use, or structurally altered except in conformity with the regulations of this Chapter for the district in which such land, buildings or structures are located, except as allowed in subsections 26-75.1 (Exceptions to Height Limits), 26-75.2 (Exceptions to Front Yard Requirements), 26-75.3 (Corner Lots), 26-75.4 (Exceptions to Side Yard Requirements), 26-75.6 (Expansion of Existing Uses/Pinelands Area) and 26-75.7 (Substandard Lots/Pinelands Area). Also, land on which a nonconforming building is located shall not be reduced in size, nor shall any lot already nonconforming be made more nonconforming in any manner.