"Governmental unit" means the State, a municipality, county, or other political subdivision of the State, or any agency thereof authorized to administer, protect and maintain lands or structures for recreation or conservation purposes;
"Recreation or conservation purposes" means the use of lands for parks, natural areas, ecological and biological study, historic areas, historic buildings or structures, forests, trails, camping, fishing, water reserves, wildlife preserves, hunting, boating, winter sports and similar uses for either public outdoor recreation or conservation of natural resources, or both.
N.J.S. § 58:10-23.11g10