N.J. Stat. Ann. § 16:1-29

The provisions of this title, with all its penalties, rights, privileges and advantages, are extended to and for the benefit of all associations, corporations and classes now or hereafter organized in this state, the object of which is the mutual improvement of their members in the science of vocal music, and to all associations now or hereafter organized in this state, the object of which is to establish and maintain what are commonly known as Sunday schools.