N.J. Stat. § 30:9-9
If the county desiring to change the location of a county psychiatric hospital under authority of R.S. 30:9-8 determines there is no suitable location at which the hospital might be relocated, and desires to locate the hospital in another county of this State, it may do so by entering into an agreement with the other county, either to build and maintain the hospital jointly, or to build and maintain the hospital by one county with the right in the other county to commit its patients therein, at a sum per week per patient to be agreed upon.
If both counties agree to build and maintain the hospital jointly, they shall concur upon the site, appoint an architect, and approve plans and specifications, and do and perform everything necessary for completion of the work authorized and the maintenance thereafter, including employment of physicians and other necessary employees.
If by their agreement one county builds and maintains the hospital, that county shall select the site, appoint the architect, and approve the plans and specifications, and do and perform everything necessary for completion of the work authorized, and the maintenance thereafter, including employment of physicians and other necessary employees.
If a county decides to change the location of its hospital, one or more counties depending upon their agreement shall have full power and authority to acquire lands within or without the county by gift, devise, purchase, or condemnation, to erect suitable buildings, and to fit, furnish, and equip the buildings, lay out the grounds, make provision for utilities and mass transit connections, and do and perform whatever is necessary or appropriate to establish a modern psychiatric hospital.
The funds to acquire the lands, erect the buildings, and perform the work, including the purchase of materials and fittings, furnishings, and equipment authorized, except for maintenance only, shall be raised by one or more counties doing the work, each to the extent of its share, by the issue and sale of bonds paid by the county treasurer or treasurers, in accordance with the counties' agreement.
N.J.S. § 30:9-9