According to the thirteenth amendment, who could be forced to work without pay?

  Those who are punished for committing a crime.

Explanation:

  The thirteenth amendment abolished slavery and involuntary servitude except for penal labor.

  This exception allows to those prisoners who had already been convicted of crimes to be required to perform labor or another punishment while in custody. But to do that they must be convicted, not be waiting for the trial.

  I hope this answer helps you.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

it was the first amendment