N.J. Stat. § 40:12-9
Any two or more municipalities in any county, any municipality and the coterminous school district, any municipality and county, or any municipality and county park commission may jointly acquire property for, or improve, operate, and maintain on existing property, any playgrounds, completely inclusive playgrounds, playfields, gymnasiums, public baths, swimming pools, or indoor recreation centers, and may appropriate money therefor. The municipality may pay over to the board of education of the school district any money as may be so appropriated to be disbursed by the board of education for any of these joint purposes. The county or county park commission may pay over to the municipality any money as may be so appropriated to be disbursed by the county or county park commission for any of these joint purposes.
N.J.S. § 40:12-9