Subject to the following, any use rendered nonconforming upon the adoption of Local Law 3 of 2023, if thereafter abandoned, may not be reestablished. Abandonment of such use consists of an overt act, or failure to act, that leads one to believe that the owner or user neither claims nor retains any interest in continuing the nonconforming use unless the owner can demonstrate to the Building Department an intent not to abandon the use. An involuntary interruption of a nonconforming use, as by fire, flood or other natural catastrophe, does not establish the intent to abandon the nonconforming use. However, if a) after the halting of such use, no building permit application is filed with the Building Department within six months after halting such use, or b) after the timely filing of a building permit application, the applicant fails to diligently pursue the processing of the application and any municipal or administrative required approvals and complete such approvals and obtain a certificate of occupancy or completion within two years after the halting of the use, the owner and/or user is presumed to have abandoned the nonconforming use, unless that presumption is rebutted by the presentation of sufficient evidence of intent not to abandon the use. If an owner or user is unable to obtain a certificate of occupancy or completion within the two-year period, the owner may request an extension of time to complete the work and obtain the required certificate. This request must be submitted in writing to the Building Department setting forth the diligent efforts that have been made, including a timeline of all actions taken by the owner or user. Upon the submission of such information, the Building Department shall refer the request to the Planning Board. Upon a showing of good cause, the Planning Board may determine that the nonconforming use is not abandoned on account of the diligent efforts shown, for a period not to exceed one additional year beyond the original two-year period.