N.J. Stat. Ann. § 54:4-3.132

The enforcing agency shall grant a certification pursuant to section 2 of this act upon receipt of a written application made under oath on a form prescribed by the Director of the Division of Taxation in the Department of the Treasury. The form shall be made available to claimants by the enforcing agency. The enforcing agency may at any time inquire into the right of a claimant to the exemption and for that purpose may require the filing of a new application or the submission of any proof necessary to determine the right of the claimant to the continuation of the exemption. The 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.