(1) A subscriber contract with a consumer and a service provider may not lay down an initial commitment period that exceeds 24 months. In every case an operator must offer users the possibility of concluding a subscriber contract with a commitment period of not more than 12 months. (2) Without prejudice to any minimum contractual period, the conditions and procedures for contract termination must not act as a disincentive against changing service provider. Article 131 (number portability) (1) All operators must enable subscribers with numbers from the telephone numbering plan referred to in Article 63 of this Act to retain their number or numbers when changing service providers in the following instances: 1. in the case of geographic numbers, at a specific location; 2. in the case of non-geographic numbers, at any location. (2) Without prejudice to the provision of the preceding paragraph, this shall not apply to the porting of numbers from a network providing services at a fixed location to a mobile network, or vice versa. (3) An operator may charge a subscriber a one-off fee for the porting of a number to another operator. This fee shall take account of the costs of the porting, but may not be so high as to act as a disincentive to use this facility. (4) The Agency may not set retail prices for the porting of numbers in a manner that would distort competition, for example through the setting of specific or common retail tariffs. (5) The costs of the provision of a network facility that enables number portability shall be borne by the operator. The operator of the network in which the call was generated shall pay the costs under the interconnection contract to the operator of the network in which the call to the ported number ends. (6) The prices charged between operators in relation to number portability must be costoriented. (7) Operators must port and activate a number as quickly as possible. In every case the number must be activated within one working day counting from the moment the operator to which the number is to be ported receives a signed contract on the porting of the number from the other operator. (8) The Agency shall regulate the method of implementation of number portability, as well as technical and other requirements for compliance with the provisions of this Article, in detail by means of a general act. (9) An operator must send the Agency a printout of the total number of all numbers, by type and block, that were ported to another operator or ported to that operator in the last year by 15 January of the current year, i.e. reflecting the situation as at 31 December as reported by the manager of the central database of ported numbers. The operator may also mandate the manager of the database of ported numbers to send the information on the ported numbers to the Agency. Article 132 (transparency and publication of information) (1) The Agency shall encourage operators to publish transparent, comparable, adequate and up-to-date information on applicable prices and tariffs, on any charges due upon termination of a contract, and on the standard terms and conditions in respect of access to publicly available electronic communications services and the use of these services for end-users and