N.J. Stat. § 54:32B-8.52
Receipts from the sale of a limousine to a person licensed under R.S. 48:16-17 to operate a limousine service, and receipts from the repair, including replacement parts, of a limousine operated by a person so licensed or by a person licensed under the laws of another state or the United States to operate a limousine service, are exempt from the tax imposed under the "Sales and Use Tax Act." For the purposes of this section, "limousine" means a motor vehicle registered under the provisions of section 12 of P.L. 1979, c.224 (C.39:3-19.5) or registered as a limousine under the laws of another state or the United States and used exclusively in the business of carrying passengers for hire to provide prearranged passenger transportation at a premium fare on a dedicated, nonscheduled, charter basis that is not conducted on a regular route and with a seating capacity in no event of more than 14 passengers, not including the driver, providing, that such a motor vehicle shall not have a seating capacity in excess of four passengers, not including the driver, beyond the maximum passenger seating capacity of the vehicle, not including the driver, at the time of manufacture. "Limousine" shall not include any taxicab, hotel or airport shuttle or bus, or bus employed solely in transporting schoolchildren or teachers to and from school, or any vehicle owned and operated without charge or remuneration by a business entity for its own purposes.
N.J.S. § 54:32B-8.52