C-438/04Mobistar SA v Institut belge des services postaux et des télécommunications (IBPT)

Domstolens egne nøkkelord

Telecommunications sector - Universal service and users' rights - Telephone number portability - Set-up costs for the provision of number portability for mobile phones - Article 30(2) of Directive 2002/22/EC (Universal Service Directive) - Pricing for interconnection related to the provision of number portability - Price orientation by reference to costs - Regulatory power of national regulatory authorities - Article 4(1) of Directive 2002/21/EC (Framework Directive) - Effective legal protection - Protection of confidential information.

Tolker