Regency Transportation, Inc., operates a freight business throughout the eastern United States. Regency maintains its corporate headquarters, four warehouses, and a maintenance facility and terminal location for repairing and storing vehicles in Massachusetts. All of the vehicles in Regency’s fleet were bought in other states. Massachusetts imposes a use tax on all taxpayers subject to its jurisdiction, including those that do business in interstate commerce, as Regency does. When Massachusetts imposed the tax on the purchase price of each tractor and trailer in Regency’s fleet, the trucking firm challenged the assessment as discriminatory under the commerce clause. 1. Do you agree that this criterion is an appropriate test in considering the Commerce Clause? 2. Whether you agree with this test or not, was it applied properly in this case?