The Federal Convention, Article VII, Section 4, 1787

From The Papers of James Madison. Volume II. Mobile: Allston Mygatt, 1842. 1232-1234.

Article VII.

Sect. 4. No tax or duty shall be laid by the Legislature on articles exported from any State; nor on the migration or importation of such persons as the several States shall think proper to admit; nor shall such migration or importation be prohibited.