ECS 15/2013 Second Final Determination: Fixed Number Portability DownloadsECS 15/2013 - Second Final Determination: Implementation of Fixed Number PortabilityECS 15/2013 - Annex A: Implementation of Fixed Number PortabilityECS 15/2013 - Annex B: Implementation of Fixed Number PortabilityECS 15 2013 - Annex C Implementation of Fixed Number Portability