The Supreme Court ruled in December that a taking occurs when a government action gives rise to “a direct and immediate interference with the enjoyment and use of land,” thus allowing the Arkansas Game & Fish Commission to proceed with claims relating to the damage caused by government-induced flooding of a state wildlife management area. (The lower court had bizarrely held that while temporary physical invasions and permanent floods were subject to takings analysis, temporary flooding, even if repeated, was not.) On remand to the U.S. Court of Appeals for the Federal Circuit, however, the United States, relying on a single passage from the opinion, contends that the Supreme Court created a new multi-factor test applicable to all regulatory and temporary physical takings claims. Cato has now joined the Pacific Legal Foundation, National Federation of Independent Business, and National Association of Home Builders on a brief supporting the Commission and arguing that the passage upon which the government relies is dicta and in any event cannot be read to upset the distinction between regulatory and physical takings that the Court has consistently asserted. It is well-established in the Supreme Court’s takings jurisprudence that government intrusions on private property that permanently deprive the owner of a valuable property interest are to be subjected to the same test, regardless of whether the invasions are permanent or temporary. Under that test, courts are to consider the duration of the government intrusion, along with other information, to determine (1) whether the invasion is the direct cause of injury to the property and (2) whether the injury is substantial enough to subtract from the owner’s full enjoyment of the property and limit his exploitation thereof. If the injury to the property is substantial, it doesn’t matter whether the it was caused by an invasion of limited duration; once it is shown that the government invasion directly and substantially interfered with an owner’s property right, the government has a categorical duty to pay compensation. In this case, the government’s intrusion permanently damaged significant property — valuable timber, from the destruction of trees — and is thus a compensable taking. The Supreme Court’s decision in Arkansas Game & Fish Commission didn’t modify or overturn the well-settled test for adjudicating physical takings claims, which remains distinct from the test that controls regulatory takings claims.