The St. Louis directory and register :

necessary for executing its inspection laws; and the net produce of
all duties and imposts laid by any state on imports or exports, shall be
for the use of the treasury of the United States; and all such laws
shall be subject to the revision and controul of the Congress. No
state shall, without the consent of Congress, lay any duty on ton-
nage, keep troops, or ships of war, in time of peace, enter into any
agreement or compact with another state, or with a foreign power,
or engage in war, unless actually invaded, or in such imminent dan-
ger as will not admit of delay.