<P>In order to ensure that exploitation-related information is duly provided to authors and performers also in cases where the rights have been sub-licensed to other parties who exploit the rights, this Directive entitles authors and performers to request additional relevant information on the exploitation of the rights, in cases where the first contractual counterpart has provided the information available to them, but that information is not sufficient to assess the economic value of their rights. That request should be made either directly to sub-licensees or through the contractual counterparts of authors and performers. Authors and performers, and their contractual counterparts, should be able to agree to keep the shared information confidential, but authors and performers should always be able to use the shared information for the purpose of exercising their rights under this Directive. Member States should have the option, in compliance with Union law, to provide for further measures to ensure transparency for authors and performers.</P>