N.J. Stat. § 39:3-10k
Unless otherwise required by federal law or regulation, and subject to any rules and regulations promulgated pursuant to the provisions of this act, no (1) designated operator of firefighting apparatus, (2) non-civilian operator of a military vehicle owned or operated by the United States Department of Defense or the National Guard, (3) operator of a farm vehicle controlled and operated by a farmer, used to transport agricultural products, farm machinery or farm supplies to or from a farm, operated within 150 miles of a person's farm, and not used in the operation of a common or contract motor carrier, or (4) operator of emergency or rescue equipment operated for the purposes of a first aid, ambulance or rescue squad or for disaster control, shall be subject to the licensing provisions of the "Commercial Motor Vehicle Safety Act of 1986," Pub.L. 99-570( 49 U.S.C. s. 2701 et seq.).
Notwithstanding the provisions of this section, a waiver shall not be granted if the granting of the waiver would place the State in a position of not being in substantial compliance with the requirements of the federal act.
N.J.S. § 39:3-10k