English to Czech Law/Patents Law (general)

Suppliers shall not practice the use of forced or indentured labor.
===Wiki:
An indentured servant is a laborer under contract of the employer for some period of time, usually four to seven years, in exchange for such things as ship's passage, food, land and accommodations.

A major problem with the system of indentured servitude was that in many cases, an indentured servant would become indebted to their employer, who would forgive the debt in exchange for an extension to the period of their indenture, which could thereby continue indefinitely. In other cases, indentured servants were subject to violence at the hands of their employers in the homes or fields in which they worked.