[You, retorting] You need to work on your reading comprehension. It says no such thing.
My reading comprehension skills are just dandy, Andy. As for what it doesn't say, here is what it does say:
No Tax or Duty shall be laid on Articles exported from any State. No Preference shall be given by any Regulation of Commerce or Revenue to the Ports of one State over those of another: nor shall Vessels bound to, or from, one State, be obliged to enter, clear, or pay Duties in another.
Lincoln's "non-blockade blockade" violated this provision of Article I. Among other things.