decision allocating radio frequencies is being extended and the supply of and demand for the frequencies being put to tender, the level of development of the market to which the frequencies being put to tender relate, and the level of such fees in other Member States. It may in no case be so high as to hinder the development of innovative services and competition in the market. (3) An application for the extension of a decision allocating radio frequencies must be submitted to the Agency no less than 30 and no more than 90 days prior to the expiry of validity of the decision. (4) The Agency shall send notice of the expiry of validity of a decision allocating radio frequencies to the e-mail address supplied by the beneficiary of the decision 90 days prior to the expiry of validity of the decision. This notice shall be of an informative nature and shall not have any legal consequences. (5) In the case of extension, the Agency shall issue a new decision allocating radio frequencies. (6) The validity of a decision allocating radio frequencies intended for requirements relating to measurements, attestations and other tests of radio equipment and a decision allocating radio frequencies for events may not be extended. Article 55 (transfer or leasing of rights to use radio frequencies) (1) The beneficiary of a decision allocating radio frequencies may transfer or lease its right to use these radio frequencies by legal transaction to another natural person or legal entity that meets the prescribed conditions, but only with the prior approval of the Agency. The Agency shall verify that this other natural person or legal entity meets the conditions laid down in a law, implementing regulation or Agency act, and that the envisaged transaction does not cause distortion of competition where the spectrum is left unused. (2) Without prejudice to the provision of the preceding paragraph, the beneficiary of a decision allocating radio frequencies that acquired the right to use these radio frequencies without paying the fee referred to in the eighth paragraph of Article 60 of this Act, except in the case of radio frequencies for analogue broadcasting services, may not transfer or lease its right to use these radio frequencies by legal transaction to another natural person or legal entity. (3) Without prejudice to the provision of the first paragraph of this Article, the beneficiary of a decision allocating radio frequencies against whom the Agency is conducting proceedings to abrogate the decision pursuant to point 3 of the fourth paragraph of Article 58 of this Act may not transfer or lease its right to use the radio frequencies which are the subject of proceedings to another natural person or legal entity by legal transaction. (4) In the case of the transfer of a right to use radio frequencies to another natural person or legal entity under the first paragraph of this Article, the Agency shall issue a new decision allocating radio frequencies to this natural person or legal entity in accordance with the provisions of the act governing the general administrative procedure. (5) The purpose of the use of radio frequencies, which is harmonised under EU regulations, may not be changed upon transfer of a right to use radio frequencies. (6) The conditions referred to in Article 52 of this Act and contained in a decision allocating radio frequencies issued on the basis of a public invitation to tender may only be amended with the prior approval of the Agency. Article 56 (accumulation of radio frequencies in order to distort competition in the market)