New Jersey Statutes Title 46. Property 46 § 24-9

In counties adopting local indexes under this chapter, the commissioners, or the county recording officers, after the term of office of the commissioners shall have expired, shall establish such subindexes as circumstances may warrant, in which shall be indexed every duly recorded or registered instrument, which, in its language, is general or vague as to the lands affected thereby, or that, for other reasons, cannot be safely and conveniently entered on the local index. Such subindex, and the methods so substituted and put into operation in such recording offices, shall be of the same force and effect as any other method authorized by this chapter.