Here’s the government’s Brief in Opposition in Mehaffy v. United States, No. 12-1416 (cert. petition filed June 3, 2013.
In that case, the Federal Circuit, in an unpublished opinion, held that Mehaffy failed the Penn Central ad hoc takings test solely because he purchased the property alleged to have been taken after the governmentt adopted the Clean Water Act. As a matter of law, he could not have any “reasonable investment-backed expectations” because his land was subject to regulations that, as applied to his land, are alleged to take property.
That reasoning seems somewhat circular, and would seem to run smack-dab into the Supreme Court’s determination in Palazzolo v. Rhode Island, 533 U.S. 606, 626 (2001), rejecting a per se rule that “postenactment purchasers cannot challenge a regulation under the Takings Clause.”
But for some reason, the lower courts have applied (or, in some cases, have not

