N.Y.C. Charter § 1804: Section 1804. Acquisitions of real property.

No purchase, lease, condemnation or other acquisition of real property by the department shall be authorized until (1) a public hearing has been held with respect to the acquisition after the publishing of notice in the City Record at least thirty days in advance of such hearing and (2) the department shall have received the approval of the mayor; provided, however, that in the case of an acquisition by purchase or condemnation, no such hearing shall be required if a public hearing is held with respect to such purchase or condemnation pursuant to any other requirement of law. In the case of a lease in which the city is to be the tenant, the notice for the hearing required in this subdivision shall include a statement of the location and proposed use of the premises, and the term and annual rent of the proposed lease.