Note, The Three-Fifths (3/5th) Compromise Article II, Section 2, Clause 3
“Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union, according to their respective Numbers, which shall be determined by adding to the whole Number of free Persons, including those bound to Service for a Term of Years, and excluding Indians not taxed, three fifths of all other Persons.”
Note: For southern plantation owners voting, this meant that 3 of 5 slaves could be counted for the purpose of voting in the House of Representatives…again, not for determining the genetic worth of their living, human property
Therefore, since the September 17, 1787 ratification of the Constitution, whereby the import of African, black slaves was outlawed scheduled for January 1, 1808.
Article I, Section IX, Clause I: The Importation Clause (1787)
“The Migration or Importation of such Persons as any of the States now existing shall think proper to admit, shall not be prohibited by the Congress prior to the Year one thousand eight hundred and eight, but a Tax or duty may be imposed on such Importation, not exceeding ten dollars for each Person.”
Therefore, while not immediately, nor even prohibiting chattel slavery in the US, Congress did arrange for the importation of black African slaves be outlawed by 1808.
Of course, not until post the Civil War was domestic chattel slavery abolished by the 13th Amendment, and citizenship to the freedmen and Freemen (non slave blacks), followed by their equal right with white citizens to co-govern by the vote of the 15th Amendment. [See The Triad Amendments]
