This report provides an overview of the third seminar in the ARENA Seminar sequel arranged 13 March 2008 in Malmö. The seminar was the last within the framework of the ARENA project. A continuation is scheduled in ARENA 2.0, which will continue the development of the functional concept for a kilometre tax in collaboration with researchers, authorities and industries – both nationally and internationally. Previous seminars were held in February 2007 and in May 2007. In February the concept of a “thin client” and a proxy as the key interface with the Toll Charger (TC)1 was discussed. The second seminar in May 2007 focused on enforcement with the purpose to highlight options for reducing future operation costs.The present report summarizes opinions and comments from a number of stakeholders on the market based business model proposed by ARENA. Some of the participants are already deeply involved in road user charging while others were potential providers of related services on an open market for RUC. The overhead slides presented can be downloaded from the web site www.arena-ruc.com/eng (downloads). The discussion indicated that the presented market based business model seemed to be a realistic concept and provide the necessary flexibility to cope with the European dimension. The concept also has the potential to attract new service providers, although it was also emphasized that any organisation aiming to act as a Toll Service Provider must have considerable financial strength which limits the potential candidates. The feasibility of the concept also requires careful consideration of the interoperability aspects and the cost-driving administrative routines.