The constitution assigns to the federal government the exclusive right to the most lucrative source of public revenue in early america : taxes on imports , and a supervening claim on the second most lucrative , excise taxes .
" The validity of a bill , as regards requisites in form , is determined by the law of the place of issue , and the validity , as regards requisites in form , of the supervening contracts , "
在形式方面之规定而言，汇票之有效性，由发票地方之法律决定，而附随产生之合约，
The middle east is the one part of the world where the us political system , as presently constituted , cannot act according to a rational calculus of national interest , because it is inhabited by another , supervening interest .
