Contracts concerning use of database

A contractual agreement by which the owner of a copy of a database which was put into circulation by sale with the consent of the producer of the database, the person who is otherwise authorised to use it or the person who is given access to a database on the basis of a contract concluded with the producer of the database or of a contract concluded with a third party with the consent of the producer of the database undertakes, vis-à-vis the producer of the database, to refrain from reproducing, distributing or communicating to the public quantitatively or qualitatively insubstantial parts of the database is ineffective insofar as these acts neither run counter to any normal utilisation of the database nor unreasonably impair the legitimate interests of the producer of the database.