(A) Any nonconforming use existing on the effective date of this chapter may be continued. See § 150.02.
(B) No nonconforming use shall be permitted in any building or on any premises which shall have been vacant for a period of two years, or whose previous nonconforming use shall be changed or shall have been changed to a conforming use.
(C) Any nonconforming building or structure of one or more of a group of nonconforming buildings or structures related to one industry and under one ownership, damaged by fire, flood, earthquake, or other act of God, may be reconstructed and used as before the calamity. However, the reconstruction must comply with the front setback required in the immediate area.
(D) Nothing contained in this chapter shall prevent the strengthening or restoring to a safe condition or the making sanitary of any building or structure or part thereof declared unsafe or unsanitary by either the commissioners of buildings or health, or prevent compliance with any lawful requirement of those commissioners.
(E) Whenever a district shall be changed hereafter, any then existing lawful use may be continued.
('73 Code, § 150.10) Penalty, see § 150.99