N.Y. Comp. Codes R. & Regs. tit. 1, § 64.6 – Importation from certain areas.

(a) Any horse or other equid originating in a state or country in which the disease Venezuelan equine encephalomyelitis is known to exist, or which has been in a state or country adjoining or contiguous to a state or country in which the disease is known to exist, shall not be transported into the State of New York, or harbored, or kept in this State for any purpose, unless such animal has been vaccinated to prevent said disease at least 14 days prior to entry into this State.
(b) No horse or other equid shall be brought into New York State from the states of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont unless the custodian of such horse has in his or her possession at the time of entry a health certificate issued by a veterinarian attesting that:
1. (1) the horse has not been exposed to equine viral arteritis or that the horse has been vaccinated against equine viral arteritis; and
2. (2) has not been exposed either directly or indirectly to equine infectious diseases in the foregoing states.