Article 71b. 1. The porting of a number referred to in Article 71 shall take place not later than within 1 working day of the date indicated in an agreement for the provision of publicly available telecommunications services with number portability as the start-up date for the provision of services by a new service provider. 2. Where the time limit referred to in paragraph 1 is not met, the subscriber shall be entitled to a single compensation from the existing service provider for each day of delay in the amount of 1/4 of total monthly fees calculated based on bills for the last three settlement periods, and for pre-paid subscribers in the amount of 1/4 of the total value of top-ups for the last three months, unless it was not possible to port the number due to reasons on the part of a system referred to in Article 78 (4). If delay in porting the number was caused by reasons not on the part of the existing service provider, it shall be entitled to recover the compensation paid in full or in part from the entity which was responsible for delay. 3. In the case the number was ported without the subscriber's consent, the subscriber shall be entitled to a single compensation from the new service provider for each day from the number activation in a new network in the amount of 1/2 of average monthly charge calculated based on bills for the last three settlement periods, and for pre-paid subscribers in the amount of 1/2 of the total value of top-ups for the last three months. 4. The amount of compensation referred to in paragraph 2 and 3 shall be calculated based on the number of days that elapse until the day of: 1) porting the number in the case referred to in paragraph 2; 2) activation of the number in the network of an existing service provider or obtaining the subscriber's consent to activate the number in the network of a new service provider in the case referred to in paragraph 3. Article 72. 1. A subscriber to a publicly available telephone service being a party to an agreement with a service provider which provides connection to a public fixed telecommunications network of an operator with significant market power may choose any provider of publicly available telephone services whose services are available in interconnected networks. 2. No claim may be raised against a subscriber for choosing a provider of publicly available telephone services referred to in paragraph 1. 3. Guided by the subscribers’ needs with respect to the choice of a service provider, the President of UKE, having completed an analysis of the market for services provided in a public mobile telecommunications network under Article 21, may, by means of a decision referred to in Article 24, impose on a designated operator with significant market power an obligation to exercise the right referred to in paragraph 1 in favour of subscribers connected to its network. Article 73. The Minister competent for digitalization shall specify, by means of an ordinance, the terms under which subscribers may use their rights referred to in Articles 69-72, taking account of the availability of publicly available telephone services, technical capabilities of public telecommunications networks and existing numbering resources. Article 74. 1. A provider of telecommunications services being a party to an agreement where a number from the national numbering plan for public telecommunications networks is assigned to the subscriber and an operator who makes it possible to receive calls by means of that number shall ensure that the subscriber has the possibility to exercise its rights referred to in Articles 69-72, consisting in the creation of adequate technical conditions or the conclusion