Following the liberalization of the telecom sector, a more market oriented approach to spectrum management has been introduced. Trade with spectrum resources is being discussed in many countries and restrictions in terms of use have been relaxed. Developments in wireless technologies imply more demand for use of radio frequencies. On the other hand technical solutions towards more efficient utilization of spectrum resources such as software defined radio are being developed. It will become easier from a technical point of view to introduce a more dynamic frequency planning preventing scarcity within specific applications as long as unused frequencies are available in other parts of the spectrum.