(1) A will or trust of a decedent who dies after December 31, 2009, and before January 1, 2011, is deemed to refer to the federal estate and generation-skipping transfer tax laws as they applied with respect to estates of decedents dying on December 31, 2009, if the will or trust contains a formula that:
(a) Refers to any of the following: "Unified credit," "estate tax exemption," "applicable exemption amount," "applicable credit amount," "applicable exclusion amount," "generation-skipping transfer tax exemption," "marital deduction," "maximum marital deduction," or "unlimited marital deduction;"
(b) Measures a share of an estate or trust based on the amount that can pass free of federal estate taxes or the amount that can pass free of federal generation-skipping transfer taxes; or
(c) Is otherwise based on a provision of federal estate tax or federal generation-skipping transfer tax law similar to the provisions in (a) or (b) of this subsection.
(2) This section is presumed to not apply with respect to a will or trust that (a) is executed or amended after December 31, 2009, or (b) clearly manifests an intent that a contrary rule applies in cases where the decedent dies on a date on which there is no then-applicable federal estate or federal generation-skipping transfer tax and such tax has been permanently repealed and not merely temporarily repealed for calendar year 2010.
(3) The reference to January 1, 2011, in this section refers, if the federal estate and generation-skipping transfer tax becomes effective before that date, to the first date on which such tax becomes legally effective.
(4) Construction of a will or trust under this section may be confirmed pursuant to the procedures set forth in the trust and estate dispute resolution act in chapter
11.96A RCW.