Consistent with United States Supreme Court precedent, may the state of East Dakota continue to dispose of its used tires in this manner?
No, because a state must comply with valid federal laws that regulate matters affecting interstate commerce. 
No, because some of the tires come from vehicles that are used by the state solely in its commercial activities. 
Yes, because some of the tires come from vehicles that are used by the state in the performance of core state governmental functions such as law enforcement. 
Yes, because the legitimate needs of the) Yes, because the legitimate needs of the federal government are satisfied by the fact that the unlicensed state disposal scheme meets, in actual practice, most of the federal standards for the licensing of such facilities.