If the 30-year period specified in this Chapter shall have expired prior to October 1, 1973, no right, estate, interest, claim or charge shall be barred by N.C. Gen. Stat. § 47B-2 until October 1, 1976, and any right, estate, interest, claim or charge that would otherwise be barred by N.C. Gen. Stat. § 47B-2 may be preserved and kept effective by the registration of a notice of claim as set forth in N.C. Gen. Stat. § 47B-4 of this Chapter prior to October 1, 1976. (1973, c. 255, s. 1.)