The original purpose of this eternity clause was to ensure that the establishment of any dictatorship in Germany would be clearly illegal; in legal practice the clause was used by plaintiffs at the Federal Constitutional Court challenging constitutional amendments that affected Articles 1, 10, 19, 101, and 103 regarding restrictions of legal recourse. Although these basic principles are protected from being repealed, their particular expression may still be amended; such as to clarify, extend or refine an entrenched principle.