What? This is Art. 1 Ch1
That all persons are born equally free and independent, and have certain natural, inherent, and unalienable rights, amongst which are the enjoying and defending life and liberty, acquiring, possessing and protecting property, and pursuing and obtaining happiness and safety; therefore no person born in this country, or brought from over sea, ought to be holden by law, to serve any person as a servant, slave or apprentice, after arriving to the age of twenty-one years, unless bound by the person's own consent, after arriving to such age, or bound by law for the payment of debts, damages, fines, costs, or the like.
So just like in the regular US constitution, 13th Amendment
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, or any place subject to their jurisdiction.
Slavery is, until this amendment is voted in, legal as a punishment in Vermont. Understand?