N.J. Stat. § 30:8-16.1
It shall be lawful for the board of county commissioners of any county in this State to establish and maintain facilities to provide services for therapy for persons with substance use disorder while confined to the jail, workhouse or penitentiary of any such county. It shall also be lawful for such board to provide therapy for such persons with substance use disorder after discharge from the jail, workhouse or penitentiary. Such facilities may be provided as a part of the jail, workhouse or penitentiary, and at such other locations as the board shall determine. It shall also be lawful for such board to contract with any municipality or any other county to provide such needed facilities and services, and to pay the whole or any part of the cost of such facilities under such contract. Each board of county commissioners is authorized to appropriate and expend the moneys necessary to carry out the purposes of this act.
N.J.S. § 30:8-16.1