N.Y.C. Admin. Code § 27-2047: § 27-2047 Mail service.

The owner of a multiple dwelling shall either:

(1) Arrange for mail to be delivered to himself or herself, his or her agents, or employees for prompt distribution to the occupants; or

(2) Provide and maintain approved mail receptacles and directories of persons living in the dwelling, as provided by federal law and by the regulations of the post office department.