Article 1, Section 9, 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.
|1.||Records of the Federal Convention|
|2.||Luther Martin, Maryland House of Delegates, 29 Nov. 1787|
|3.||Luther Martin, Genuine Information, 1788|
|4.||James Iredell, Proposed Amendment to the Constitution, North Carolina Ratifying Convention, 1 Aug. 1788|