(a) The settlor of a trust affected by AS 13.36.105 - 13.36.220 may, by provision in the instrument creating the trust if the trust is created by a writing, by oral statement to the trustee at the time of the creation of the trust if the trust is created orally, or by an amendment of the trust if the settlor reserved the power to amend the trust,
(1) relieve the trustee from any or all of the duties, restrictions, and liabilities that would otherwise be imposed on the trustee by AS 13.36.105 - 13.36.220;
(2) alter or deny to the trustee any or all of the privileges and powers conferred on the trustee by AS 13.36.105 - 13.36.220; or
(3) add duties, restrictions, liabilities, privileges, or powers, to those imposed or granted by AS 13.36.105 - 13.36.220.
(b) Notwithstanding (a) of this section, an act of the settlor may not relieve a trustee from the duties, restrictions, and liabilities imposed on the trustee by AS 13.36.140, 13.36.145, or 13.36.150.