 As a future economic success is not measurable, the granting of exploitation rights by using yet unknown types of use is reserved to the author, even if they have already granted exploitation rights concerning known types of use.In accordance with § 31a UrhG the author is entitled to grant rights of use or to contractually bind himself to do so, even if the type of use is yet unknown at that time.A pre-condition be that the author submits their intention in written form, § 31a I 1 UrhG.