 The author could, however, decide whether or not they agreed to have their work exploited regarding a type of use not yet known at the time of conclusion of the contract and if so, by whom.It was intended that the countervalue of granting rights of use for new types of use should always be secured for the author; they should be in the position of negotiating an appropriate fee arrangement.It is decisive that the type of use is not only specified by its technical possibilities but also by its economical importance and usability.