Section 25A-30 - Deferral charges(a) A seller may, by agreement with the buyer, defer the due date of all or any part of one or more installments under an existing consumer credit installment sale contract.(b) Except as provided by subsections (e) and (f) of this section, a deferral agreement must be in writing, dated and signed by the parties.(c) A deferral agreement may provide for a deferral charge not to exceed the rate of one and one-half percent (1 1/2%) of each installment for each month from the date which such installment or part thereof would otherwise have been payable to the date when such installment or part thereof is made payable under the deferral agreement.(d) If a deferral charge is made pursuant to a deferral agreement, a default charge provided in G.S. 25A-29 may be imposed only if the installment as deferred is not paid when due and no new deferral agreement is entered into with respect to that installment.(e) If the deferral agreement extends the due date of only one installment, the agreement need not be in writing.(f) A deferral agreement for which no charge is made shall not be subject to subsections (b), (c) or (d) of this section.