1. Member States shall ensure that all subscribers of publicly available telephone services, including mobile services, who so request can retain their number(s) independently of the undertaking providing the service:
(a) in the case of geographic numbers, at a specific location; and
(b) in the case of non-geographic numbers, at any location.
This paragraph does not apply to the porting of numbers between networks providing services at a fixed location and mobile networks.
2. National regulatory authorities shall ensure that pricing for interconnection related to the provision of number portability is cost oriented and that direct charges to subscribers, if any, do not act as a disincentive for the use of these facilities.
3. National regulatory authorities shall not impose retail tariffs for the porting of numbers in a manner that would distort competition, such as by setting specific or common retail tariffs.