N.J. Stat. Ann. § 45:16-11

Nothing in this chapter shall be construed to interfere with or punish veterinarians residing in other States or countries meeting registered veterinarians of this State in consultation, or residing on the border of a neighboring State and duly authorized under the laws thereof to practice veterinary medicine or surgery therein whose practice extends into the limits of this State, but such practitioner shall not open any office or appoint a place to meet patients or receive calls within the limits of this State. Nothing in this chapter shall be construed to prohibit the practice of veterinary medicine, surgery or dentistry by any practitioner who shall have been registered in any county in this State before the first Monday in May, 1902, and one such registry shall be sufficient warrant to practice veterinary medicine, surgery or dentistry in any county in this State.