N.C. Gen. Stat. § 44-68.17: Liens and notices filed before August 1, 1990.

All liens, notices, certificates, releases and refilings filed before August 1, 1990, to which this Article would otherwise apply if such filing occurred on or after August 1, 1990, and any indexes pertaining thereto, shall be transferred to and maintained in the office in which such filing would have been made had the filing occurred on or after August 1, 1990. (1989 (Reg. Sess., 1990), c. 1047, s. 1.)