Nathan Clifford, State Tonnage Tax Cases Cox v. Collector Trade Company…
“ Taxes levied by a State upon ships and vessels owned by the citizens of the State as property, based on a valuation of the same as property, are not within the prohibition of the Constitution, but it is equally clear and undeniable that taxes levied by a State upon ships and vessels as instruments of commerce and navigation are within that clause of the instrument which prohibits the States from levying any duty of tonnage, without the consent of Congress ”
