A nonconforming structure or building, or a structure or building whether or not occupied for a nonconforming use, which has been partially or totally damaged by an unintended destructive event such as, but not limited to, an accidental fire, explosion, collapse, unintended demolition or unintended major structural damage caused by the applicant or a third party, or by natural causes ("unintended damage incident"), as opposed to, but not limited to, deterioration, dilapidation, or decay of the structure or building due to time or neglect, shall only be reconstructed in the exact location of the original footprint of the structure or building, or in a location that reduces the nonconformity, and reconstructed in conformity with all regulations of this chapter. Unless otherwise extended by the Borough Code Official upon a showing of good cause by the applicant, reconstruction shall begin within one year from the date of the unintended damage incident and shall be carried on without interruption until completion.