(a)(1) A will or trust of a decedent who dies after December 31, 2009, and before January 1, 2011, that contains a formula referring to the “unified credit”, “estate tax exemption”, “applicable exemption amount”, “applicable credit amount”, “applicable exclusion amount”, “generation-skipping transfer tax exemption”, “GST exemption”, “marital deduction”, “maximum marital deduction”, or “unlimited marital deduction”, or similar words or phrases relating to the federal estate tax or generation-skipping transfer tax or that measures a share of an estate or a 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 that is otherwise based on a similar provision of federal estate tax or generation-skipping transfer tax law, shall be deemed to refer to the federal estate tax or generation-skipping transfer tax laws as they applied with respect to estates of decedents dying or generation-skipping transfers made on December 31, 2009.

(b)(1) The personal representative or any interested person under a will or other instrument may bring a proceeding to determine whether the decedent intended that the references described in subsection (a) of this section be construed with respect to the law as it existed after December 31, 2009.