N.Y. Agric. & Mkts. Law § 90-c

§ 90-c. Prohibitions. 1. It shall be unlawful for any person to\npurchase, or deal in, or sell cattle, swine, horses, deer, camelids,\nsheep, goats or poultry at wholesale, or for any person to operate or\nconduct an auction where cattle, swine, horses, deer, camelids, sheep,\ngoats or poultry are sold, or for any person to transport poultry,\nunless such wholesale cattle, swine, horse, deer, camelids, sheep, goats\nor poultry dealer or auctioneer or poultry transporter holds a domestic\nanimal health permit granted by the commissioner.\n 2. No person who holds or is required to hold a domestic animal health\npermit shall purchase, sell or otherwise deal in cattle, deer, swine,\ncamelids, sheep or goats unless and until an ear tag is securely affixed\nto the ear of such animal or unless such animal is otherwise identified\nby a registration number, distinctive tattoo, electronic identification\ndevice or other unique permanent mark or, for an animal that is moved\ndirectly to slaughter, an official backtag.\n 3. No person shall deface, obliterate or remove an ear tag or other\nidentification mark affixed to an animal under his or her control, or\nshall affix an ear tag to the ear of an animal that has previously been\naffixed to the ear of another animal.\n