Demolition or destruction

a. If a legal nonconforming structure as to use, or otherwise not conforming to the provisions of this ordinance, is demolished in any lawful manner, such structure shall not be rebuilt unless it conforms with all provisions of this ordinance.

b. Should a legal nonconforming structure, or nonconforming portion of a structure, be damaged by an accident or act of God to an extent of more than 51 percent of its replacement cost at the time of damage as determined by the zoning officer, it shall be given one year in which to commence rebuilding, repairing or replacing the damaged structure. If such action is not taken within said one-year period, then it shall not be rebuilt, repaired or replaced except in conformity with the provisions of this ordinance.