Framework conditions within constitutional law for contractual cooperation between state and society in the area of parliamentary legislation

The modern state attempts to manage its expanding tasks by integrating private parties into state functions. In this context private parties also participate in legislation. They do so, for example, by taking part in parliamentary hearings as experts and interest groups, but also by concluding legislative contracts with the state. In contrast to the generally held view these contracts are not necessarily invalid. And, taking into account the principle of the protection of confidence guaranteed by our constitution, contracts of this kind may bind the parliamentary legislator.