Except as provided in this section, the provisions of §§ 20.2056A-1 through 20.2056A-12 are applicable with respect to estates of decedents dying after August 22, 1995. The rule in the fourth sentence of § 20.2056A-5(c)(2) regarding unitrusts and distributions of income to the surviving spouse in conformance with applicable local law is applicable to trusts for taxable years ending after January 2, 2004.
26 C.F.R. §20.2056A-13