N.J. Stat. Ann. § 18A:37-4

The teacher in a school having but one teacher or the principal in all other cases may suspend any pupil from school for good cause but such suspension shall be reported forthwith by the teacher or principal so doing to the superintendent of schools of the district if there be one. The superintendent to whom a suspension is reported or if there be no superintendent in the district, the teacher or principal suspending the pupil shall report the suspension to the board of education of the district at its next regular meeting. Such teacher, principal or superintendent may reinstate the pupil prior to the second regular meeting of the board of education of the district held after such suspension unless the board shall reinstate the pupil at such first regular meeting.