New Jersey Statutes 40:67-23.5. Use of municipal reimbursement to pay for services
b. The amount to be reimbursed to the qualified private community shall be used by the qualified private community to pay for the service which the municipality chooses not to provide, and that amount shall be the actual cost to the qualified private community of providing that service, but not exceeding the amount which the municipality would have expended on that service if it were provided directly by the municipality to the qualified private community.
c. An agreement entered into pursuant to this section shall provide for an accounting by the qualified private community of the use of the money paid over to it by the municipality, and for the refunding to the municipality of any payments in excess of the amounts actually expended or contractually committed by the qualified private community during the accounting period in order to provide for the services covered by the agreement.
L.1989, c.299, s.4.