N.Y. Pub. Health Law § 505-a

§ 505-a. Purchase of certain animals for scientific tests. It shall be\nunlawful for any laboratory or institution approved under this article,\nto purchase any dog or cat for experimental purposes unless the seller\nthereof shall provide proof of ownership of the animal of a sufficiency\nprescribed by the commissioner. Every such laboratory or institution\nshall keep a record of each such purchase with the name and address of\nthe seller and a copy of the proof of ownership given at the time of the\ntransaction.\n