N.J. Stat. § 39:3B-1
Every bus when being used to transport children to and from school pursuant to chapter 39 of Title 18A of the New Jersey Statutes shall be equipped with electric identification and warning lamps which, when such bus has stopped for the purpose of receiving or discharging any school child, will exhibit a flashing red light plainly visible at such a distance as will enable the driver of a vehicle approaching or overtaking the bus to see the red light in sufficient time to bring the same to a stop within 10 feet of the bus. Such lamps shall meet the requirements prescribed by the Motor Vehicle Commission, which requirements shall not be inconsistent with the provisions of this Title or any rule or regulation made pursuant thereto.
If a bus is equipped with electric identification and warning lamps that are required under this section and is stopped for the purpose of receiving or discharging a person who has a developmental disability, the driver of the bus shall activate the flashing lights and any other equipment, including a crossing control arm, installed on the bus for the safety of passengers.
Nothing contained herein shall be construed to apply to any motorbus when carrying passengers for hire over any street or road and accepting and discharging indiscriminately such persons as may offer themselves for transportation either at the termini or points along the route on which it is being operated.
N.J.S. § 39:3B-1