The total amount payable at least annually to a person or persons named in the trust document, at least one of which is not an organization described in section 170(c) of the Internal Revenue Code, may not be less than five percent (5%) of the initial net fair market value of the property placed in trust as finally determined for federal tax purposes, except as provided in subsection (g) of this section.
Notwithstanding the foregoing sentence, in computing any underpayment or overpayment of the annuity amounts, if the governing instrument was executed or last amended before August 9, 1984, and if the governing instrument does not specify that a ten percent (10%) rate of interest shall be used, the underpayment or overpayment of the annuity amounts must be computed using an interest rate at six percent (6%) a year, compounded annually.
N.C. Gen. Stat. § 36C-4B-5