This period may be shorter if the publication of a legal act based on which it is necessary to introduce modifications takes place with a notice period shorter than one month before that act's entry into force or such a period results from a decision of the President of UKE. At the same time the subscriber should be informed of the right to terminate an agreement if he/she does not accept these modifications, while the time limit for exercising this right may not be shorter than by the date on which these modifications enter into force. 1a. A subscriber not being a party to an agreement concluded in writing in order to receive information and notifications in cases specified under the Act may provide the data: 1) in the case of a subscriber being a natural person: a) a name and surname, b) a personal number (PESEL), and in the case of a subscriber without a PESEL number – a name and number of a document confirming identity, c) an address for correspondence; 2) in the case of a subscriber other than a natural person: a) a name, b) a REGON number or tax identification number (NIP), or a number in the entrepreneurs register in the National Court Register or another relevant register maintained by a Member State, c) a seat and address for correspondence. 1b. At the request of a subscriber who has made available his/her data referred to in paragraph 1a, the provider of publicly available telecommunications services shall provide the contents of each proposed modification to the conditions of an agreement, including those specified in the rules and regulations for the provision of publicly available telecommunications services, electronically to an electronic mail address indicated for this purpose by the subscriber or by similar remote communications means. 2. In the event of exercising the right to terminate an agreement referred to in paragraph 1, a provider of publicly available telecommunications services shall not be entitled to the recovery of an allowance referred to in Article 57 (6), of which the subscriber should be also informed. 3. The provision of paragraph 2 shall not apply if the necessity to make modifications referred to in paragraph 1: 1) results directly from changes to the provisions of law or the elimination of forbidden contractual clauses; 2) results from a decision of the President of UKE referred to in Article 63 (2a). 3a. Where a proposed modification to the conditions of an agreement specified in the rules and regulations for the provision of publicly available telecommunications services results directly from modifications to the provisions of law, causes reduction in the prices for telecommunications services, addition of a new service or results from a decision of the President of UKE, the provider of publicly available telecommunications services shall announce publicly the text of proposed modifications at least one month before these modifications are introduced. This period may be shorter if the publication of a legal act based on which it is necessary to introduce modifications takes place with a notice period shorter than one month before that act's entry into force or such a period results from a decision of the President of UKE. At the same time the subscriber should be informed of the right to terminate an agreement if he/she does not accept these modifications, while the time limit for exercising this right may not be shorter than by the date on which these modifications enter into force. 4. A provider of publicly available telecommunications services shall inform in writing the subscribers who are parties to an agreement concluded in a written or electronic form about changes to the name, address or seat of that service provider without delay, unless the