N.Y. Arts & Cult. Aff. Law § 25.15
Immediately upon the receipt of the license or certificate issued pursuant to this article by such commissioner, the licensee named therein shall cause such license to be posted and at all times displayed in a conspicuous place in the principal office of such business for which it is issued, and shall cause the certificate for each branch office, bureau, agency or sub-agency to be posted and at all times displayed in a conspicuous place in such branch office, bureau, agency or sub-agency for which it is issued, so that all persons visiting such principal office, branch office, bureau, agency or sub-agency may readily see the same. Such license or certificate shall at all reasonable times be subject to inspection by such commissioner or his authorized inspectors. It shall be unlawful for any person, firm, partnership or corporation holding such license or certificate to post such license or certificate or to permit such certificate to be posted upon premises other than those described therein or to which it has been transferred pursuant to the provisions of this article or unlawfully to alter, deface or destroy any such license or certificate.
N.Y. Arts and Cult. Aff. Law § 25.15