AMENDMENT 13. Section 1. Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States ...
The proclamation declared, "all persons held as slaves within any States, or designated part of the State, the people whereof shall be in rebellion against the United States, shall be then ...
It forbade slavery and involuntary servitude, “except as punishment for crime whereof the party shall have been duly convicted.” Now, one could argue that the inmates are not forced to work ...