A building, structure or use which does not comply with the regulations of this section relative to the district in which it is located, and which was lawfully in existence at the time of the passage of this section, may be continued and used in its nonconforming status, subject to the provisions of this Zoning Ordinance; but this provision shall not permit the continuance of any building, structure, or use constructed, moved, altered, or commenced ion violation of any previous ordinance of the Village.
(a)   A nonconforming building, structure or use shall not be extended .
(b)   A nonconforming building, structure or use shall not be changed, except in such manner as to bring it into conformity with the provisions of this section.
(c)   A nonconforming building, structure or use, if destroyed, damaged or prevented by fire, explosion, flood, earthquake, war, riot or act of God, may be required or restored and devoted to the same or a more restricted use; provided that such repair and restoration be complete and such use resumed within twelve months of the calamity, and provided that all applicable height, area and yard regulations are complied with in such repair and restoration.
(d)   Nothing in this chapter shall prevent the strengthening or restoring to a safe condition of any building or structure or part thereof declared unsafe by any lawful authority or officer.
      (1978 Code Sec.  1264.01)