Clause 6: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.

• 任何有关商务或纳税的条例，均不得赋予某一州的港口以优惠待遇 ; 亦不得强迫任何开往或来自某一州的船苹，驶入或驶出另一州，或向另一州纳税。