If commissioners shall be appointed under section 46:24-1 of this title in any county, all nominal indexes in use in the county recording office of such county shall be continued as before, and every combination or analytical nominal index theretofore in use in such office shall be continued under the direction of such commissioners, to the time of the commencement of the local indexes mentioned in section 46:24-7 of this title, and thereafter the same last named nominal indexes shall be continued in lieu of all other nominal indexes of such instruments by the county recording officer of any such county, and the fees for such indexing authorized by law shall be paid to such recording officer.
N.J.S. § 46:24-12