relate to: 1. the obligation to provide the service or use the type of technology for which the right to use a frequency was allocated, including requirements concerning coverage and quality where appropriate; 2. the provision of efficient use of radio frequencies; 3. the technical and operational conditions necessary to prevent harmful interference and limit public exposure to electromagnetic fields, if such conditions differ from those included in the general authorisation; 4. the duration of a right to use radio frequencies; 5. the transfer of ownership of a right to use radio frequencies or the leasing of a right to use radio frequencies, and the conditions applying to such transfer or lease; 6. payments made under Article 60 of this Act; 7. additional obligations undertaken by the selected tenderer during participation in the public invitation to tender (e.g. concerning the rate of construction of an electronic communications network, programme content and the like); 8. obligations regarding acts of international law applicable in the Republic of Slovenia and relating to radio frequencies; 9. special conditions determined for the use of radio frequencies intended for requirements relating to measurements, attestations and other tests of radio equipment; 10. the conditions ensuing from the selection decision referred to in Article 34 of this Act and the EU regulation on the basis of which it was issued. Article 53 (period of validity of a decision allocating radio frequencies) (1) The Agency shall issue a decision allocating radio frequencies for a fixed period of time, with a suitable period of depreciation of investments which may not exceed 15 years, except for the allocation of radio frequencies intended for aviation and maritime mobile services. (2) The Agency shall issue a decision allocating radio frequencies intended for requirements relating to measurements, attestations and other tests of radio equipment for a limited area of coverage and for not more than 90 days. (3) The Agency shall, as a rule, issue a decision allocating radio frequencies intended for specific events for not more than 15 days. Article 54 (extension of a decision allocating radio frequencies) (1) The validity of a decision allocating radio frequencies, with the exception of decisions allocating radio frequencies for the provision of public communications services to end-users, may be extended at the proposal of the beneficiary of the decision if all the conditions for the use of those radio frequencies as prescribed are being met upon expiry of the decision, taking into account the objectives referred to in Articles 194 to 197 of this Act. (2) In the case of the extension of a decision allocating radio frequencies as referred to in the preceding paragraph, for all radio frequencies originally allocated on the basis of a public invitation to tender, with the exception of radio frequencies for analogue broadcasting services, a specific fee shall be paid for the efficient use of a limited natural resource so as to ensure optimal use of the radio frequencies allocated. This shall be a revenue of the budget. The amount and the method of payment of the fee shall be set by the Agency, which must obtain the prior approval of the Government. In setting the amount and the method of payment of the fee, due regard must be paid to the period for which the validity of the