New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 3B-4

Every bus subject to the provisions of section 1 of this act shall be equipped with a mirror of the convex type, or such other comparable device as the State Board of Education  1 may authorize or prescribe, which is affixed to the bus in such a manner that the seated driver may observe or otherwise ascertain through its use the condition of the road from the front bumper forward to the point where direct observation is possible. Such mirror or other comparable device, and its location on the bus, shall meet the requirements specified by the State Board of Education, which requirements shall not be inconsistent with the provisions of this Title or any rule or regulation made pursuant thereto.