N.C. Gen. Stat. § 39-6.6

(1) A subordination agreement shall be given effect in accordance with its terms and is not required to state any interest rate, principal amount secured, or other financial terms.

(2) The trustee of a deed of trust shall not be a necessary party to a subordination agreement unless the deed of trust provides otherwise.

(3) For purposes of G.S. 1-47, a subordination agreement is deemed a conveyance of an interest in real property.

(4) This section is not exclusive. No subordination agreement that is otherwise valid shall be invalidated by this section.

(5) This section applies to a subordination agreement regardless of when the agreement was signed by the party or parties thereto, except that this section does not apply to an agreement that (i) is the subject of litigation pending on the effective date of this subsection, and (ii) was filed or recorded before October 1, 2003.

(6) In this section: "Interest in real property" includes all rights, title, and interest in and to land, buildings, and other improvements of an owner, tenant, subtenant, secured lender, materialman, judgment creditor, lienholder, or other person, whether the interest in real property is evidenced by a deed, easement, lease, sublease, deed of trust, mortgage, assignment of leases and rents, judgment, claim of lien, or any other record, instrument, document, or entry of court.

(7) "Subordination agreement" means a written commitment or agreement to subordinate or that subordinates an interest in real property signed by a person entitled to priority.