N.J. Stat. Ann. § 54:4-3.113c

3. No certification shall be made by the local enforcing agency as provided in this act, except upon written application therefor, which application shall be made under oath on a form prescribed by the director, and provided for the use of claimants by the local enforcing agency. The local enforcing agency may at any time inquire into the right of a claimant to the exemption, and for that purpose the local enforcing agency may require the filing of a new application or the submission of such proof as the local enforcing agency shall deem necessary to determine the right of the claimant to the continuance of the exemption. The local enforcing agency shall have the right to make an inspection of the premises which are the subject of the claim for exemption under this act.