Article 69 (validity of a decision allocating numbering resources) A decision allocating numbering resources shall be issued by the Agency for an indefinite period of time. Article 70 (transfer of the right to use numbering resources) (1) The beneficiary of a decision allocating numbering resources may transfer its right to use these resources by legal transaction to another natural person or legal entity that meets the prescribed conditions. However, this may only be done with the prior approval of the Agency, which shall verify whether the natural person or legal entity meets the conditions laid down in a law, implementing regulation or Agency act. (2) In the transfer of a right to use numbering resources to another natural person or legal entity under the preceding paragraph, the Agency shall issue a new decision allocating numbering resources to this natural person or legal entity in accordance with the provisions of the act governing the general administrative procedure. (3) The purpose of use of numbers harmonised under EU regulations may not change with the transfer of the right referred to in the preceding paragraph. Article 71 (amendment of a decision allocating numbering resources) (1) The Agency may, for the purposes of alignment with the changes or additions to the plan under the third paragraph of Article 63 of this Act, amend a decision allocating numbering resources that has already been issued, ex officio and by decision, within 30 days of the entry into force of the changes or additions to the plan. In this case, the beneficiary of a decision allocating numbering resources or the users to whom they have been allocated shall not have the right to demand compensation. (2) The Agency may also amend a decision allocating numbering resources at the proposal of its beneficiary. Article 72 (revocation of a decision allocating numbering resources) (1) The Agency must abrogate a decision allocating numbering resources ex officio if it finds that: 1. the application for the decision allocating numbering resources contained false information; 2. the beneficiary no longer meets the prescribed conditions under the applicable legislation or its decision allocating numbering resources; 3. the allocated numbering resources have not begun to be used within three years of the issuing of the decision allocating numbering resources or are not used for more than one year; 4. the beneficiary has transferred the right to use numbering resources to another natural person or legal entity by legal transaction in accordance with the first paragraph of Article 70 of this Act. (2) The Agency shall also abrogate a decision allocating numbering resources ex officio: 1. if the fee for the use of the numbering resources or the fee for the efficient use of a limited natural resource have not been paid despite a warning to do so;