U.S. Supreme Court
Commissioner v. Estate of Bosch, 387 U.S. 456 (1967)
Commissioner of Internal Revenue v. Estate of Bosch
Argued March 22, 1967
Decided June 5, 1967
387 U.S. 456
Where federal estate tax liability turns upon the character of a property interest held and transferred by the decedent under State law, held, federal authorities are not bound by the determination made of such property interest by a state trial court; if there is no decision by the State's highest court, federal authorities must apply what they find to be the state law after giving "proper regard" to relevant rulings of other courts of the State. Pp. 387 U. S. 457, 387 U. S. 462-466.