Roberts, C. J., dissenting
U. S., at 685.
These three cases found a violation of the treaty when the challenged action–application of trespass law and enforcement of a license requirement–actually blocked the Yakamas from fishing at traditional locations. Applying the reasoning of those decisions to the Yakamas’ right to travel, it follows that a State could not bar Yakama members from traveling on a public highway, or charge them a toll to do so.
Nothing of the sort is at issue here. The tax before us does not resemble a blockade or a toll. It is a tax on a product imported into the State, not a tax on highway travel. The statute says as much: “There is hereby levied and imposed… a tax… on each gallon of motor vehicle fuel.” Wash. Rev. Code §82.36.020(1) (2012) (emphasis added). It is difficult to imagine how the legislature could more clearly identify the object of the tax. The tax is calculated per gallon of fuel; not, like a toll, per vehicle or distance traveled. It is imposed on the owner of the fuel, not the driver or owner of the vehicle–separate entities in this case. And it is imposed at the same rate on fuel that enters the State by methods other than a public highway–whether private road, rail, barge, or pipeline. §§82.36.010(4), 020(1), (2). Had Cougar Den filled up its trucks at a refinery or pipeline terminal in Washington, rather than trucking fuel in from Oregon, there would be no dispute that it was subject to the exact same tax. See §§82.36.020(2)(a), (b)(ii). Washington is taxing the fuel that Cougar Den imports, not Cougar Den’s travel on the highway; it is not charging the Yakamas “for exercising the very right their ancestors intended to reserve.” Tulee, 315 U. S., at 685.
It makes no difference that Washington happens to impose that charge when Cougar Den’s drivers cross into Washington on a public highway. The time and place of the imposition of the tax does not change what is taxed,
