N.J. Stat. Ann. § 40:37-147.1

Whenever any county park commission shall have constructed and maintained, or shall construct and maintain, an indoor or outdoor recreation center or centers and other special facilities for the use, recreation and entertainment of the public for sports, exhibitions, games, concerts, skating rinks, boating, tennis, golf, zoo, nature center and other recreational facilities, said commission, in order to provide the funds, in whole or in part, necessary to operate, maintain, improve and police the same, may establish charges and collect reasonable fees, rents or other charges for admission to, participation in, or use of said facilities and for any recreational privilege, entertainment or other activity.