(a) A debtor or secondary obligor may waive the right to notification of disposition of collateral under AS 45.29.611 only by an agreement to that effect entered into and authenticated after default.
(b) A debtor may waive the right to require disposition of collateral under AS 45.29.620(e) only by an agreement to that effect entered into and authenticated after default.
(c) Except in a consumer goods transaction, a debtor or secondary obligor may waive the right to redeem collateral under AS 45.29.623 only by an agreement to that effect entered into and authenticated after default.