Whether Congress authorized Alaska to require in-state primary processing of timber taken from state lands before it could be exported.
Holding
No. Congress did not unmistakably authorize Alaska's local-processing requirement, so the requirement remained subject to dormant Commerce Clause scrutiny.
Reasoning
The Commerce Clause limits state measures that substantially burden interstate or foreign commerce, but Congress may permit state regulation that otherwise would violate that limit. Congressional permission must be unmistakably clear because Congress, unlike an individual State, represents the interests of all affected States and can make the collective choice to tolerate a burden on commerce.
Federal policy did restrict the shipment of unprocessed timber from federal lands in Alaska. But Congress and the relevant federal regulations acted only with respect to federal timber; they did not affirmatively approve comparable restrictions on timber owned and sold by Alaska. A state policy's consistency with, or possible furtherance of, federal objectives is not enough to establish congressional authorization.
The need for clear congressional approval was especially strong because Alaska's rule burdened foreign commerce. Foreign-trade restrictions can affect the Nation's ability to speak with one voice in commercial relations with other countries, an area in which federal authority is particularly important.