Alabama, Tennessee, Vermont remove slavery loopholes from constitutions, Louisiana does not

https://www.foxnews.com/politics/alabama-tennessee-vermont-remove-slavery-loopholes-constitutions-louisiana-does-not 

Three states have voted to change their state constitutions to remove a loophole allowing slavery as a form of punishment. 

Voters in Vermont, Tennessee and Alabama voted Tuesday to end constitutional clauses that allow slavery or indentured servitude as a form of punishment.

Ratified in 1865, the 13th Amendment to the U.S. Constitution abolished slavery and involuntary servitude in America, but it provided leeway for the practice as punishment for individuals convicted of a crime. Several state constitutions still have language allowing involuntary servitude for prisoners.