N.J. Stat. Ann. § 40:37-95.8

It shall be a misdemeanor for any member of the park commission or any officer or employee appointed by it, to be interested directly or indirectly in purchasing any real estate or any right or interest therein, or in furnishing any of the materials, supplies or labor for the erection or construction of any building or improvement contemplated by the provisions of this act or in any contract which the park commission is empowered to make.