(A) Maintenance and repairs shall be permitted to be made to nonconforming structures, provided the extent of the nonconformance is not increased.
(B) All additions or structural alterations to nonconforming structures shall conform to the requirements of this code.
(C) Should a nonconforming structure be damaged or destroyed by any means to an extent of more than 50% of its fair market value at time of destruction, it shall not be reconstructed except in conformity with the provisions of these regulations.
(D) Damage to an extent less than 50% shall be repaired in a manner as nearly conforming as possible. No repairs or reconstruction shall be made unless the restoration is started within 6 months from the date of partial destruction and restoration is completed within 6 months from the start of construction.