Contrary to the holding of Agins v. City of Tiburon, which held that a government regulation of private property effects a taking if such regulation does not substantially advance legitimate state interests, the test of whether a governmental regulation substantially advances a legitimate state interest is irrelevant to determining whether the regulation effects an uncompensated taking of private property in violation of the Fifth Amendment. Decided May 23, 2005 (argued February 22, 2005). Opinion of the Court: Sandra Day O'Connor → go there Applied: the Fifth Amendment → go there Topic: Takings Clause. Lingle v. Chevron U.S.A. Inc., 544 U.S. 528 (2005), was a landmark case in United States regulatory takings law whereby the Court expressly overruled precedent created in Agins v. City of Tiburon. Agins held that a government regulation of private property effects a taking if such regulation does not substantially advance legitimate state interests. Writing for the Court, Justice O’Connor found the test untenable for a number of reasons, but declined to grant Chevron relief because Chevron’s motion before the court was limited to a discussion of the “substantially advances” theory which had just been struck down. The Court remanded to the Ninth Circuit for a determination of whether the statute exacted a taking according to the formula of Penn Central. Wiki link