(a) The person authorized to control the disposition shall carry out the directions of the decedent to the extent that the decedent's estate or the person is financially able to carry out the directions.
(b) Notwithstanding any other provision in AS 13.06 — AS 13.36 (Uniform Probate Code), if a person provides directions in a disposition document that is contained in a will, the directions shall be carried out immediately without the necessity of probate. If the will is not probated or is declared invalid for testamentary purposes, the directions are valid to the extent to which they have been acted on in good faith.