N.Y.C. Admin. Code § 11-208: § 11-208 Special right of entry; certificate of the commissioner of finance.

A right of entry upon real property and into buildings and structures at all reasonable times to ascertain the character of the property shall not be allowed to any person acting in behalf of the department of finance, other than the officials mentioned in sections one hundred fifty-six and one thousand five hundred twenty-one of the charter, unless a certificate therefor, executed in writing and signed by the commissioner of finance, is presented by such person to the owner, lessee, or occupant of the premises or his or her agent before entry thereon is made.