My guess, probably not accurate, is that the Governmentneeds to tax the exports of goods because of the services put into play. First, the object has to be made to fit the order. Then, that object(s) or good(s) have to be transferred over to the area the order is for. This is just an estimated guess.
yesw
they are allowed to tax imports
In Australia exports overseas are covered by the federal government.
Tariff
the federal government is authorized to tax imports and exports
congress can't tax exports, because it says it in the constitution.
Exports
tariff
tariff
tariff
exports
yes