Any nonconforming use or structure partially damaged by fire, casualty or act of God may be repaired, restored, reconstructed or used as before, provided that the area of such use, building or structure shall not exceed the area which existed prior to such damage. Cessation of use or failure to diligently prosecute the rebuilding of a partially destroyed building or structure for a period of 12 consecutive months shall be interpreted as a rebuttable presumption of the intention to abandon such nonconforming use or structure, and it shall be the burden of the applicant or party supporting the preexisting nonconforming use or structure to demonstrate to the Board of Adjustment that the use or structure was not abandoned under both the objective and subjective tests of New Jersey case law. In the event total destruction occurs, then the provisions of § 190-68 shall apply.