In common law systems these rules would not be seen as laws but as mere legal conventions as they cannot be upheld by judges; within the Dutch civil law system, however, they are part of the more extended Dutch-German legal concept of the "Recht", the total "legal" normative structure, be it written or unwritten, so that they have full normative force. Indeed, that force is much larger than with written constitutional rules; any breach of the unwritten rules would cause an immediate constitutional crisis.