enforcement of obligations of authorized network operators and service providers; (b) costs for international cooperation, harmonization and standardization, market analysis, monitoring compliance and other market control; and (c) costs for any regulatory work involving compliance with this Act or any other law and the preparation and enforcement of any decisions issued by or under this Act, or under any regional or international directives, decisions or Acts. (2) The Authority shall, in relation to the imposition of regulatory fees provided for under this Act, publish an annual overview of its administrative costs and of the total sum of charges collected. (3) The Authority shall, in the case of administrative charges and regulatory fees imposed on an annual basis, make appropriate repayments or compensation in the case of overcharging, or impose additional charges in the case of undercharging of a person to whom a charge is imposed in the light of any difference between the total sum of regulatory fees collected and regulatory costs incurred. Application procedures 17. (1) An application for an authorisation under this Act shall be in accordance with the procedures set out in the Regulatory Authority Act, this Act and regulations made under them. (2) Licences shall be granted according to open, non-discriminatory and transparent procedures, and, for the purpose, all candidates shall be subject to the same procedures unless there is an objective reason for subjecting them to different treatment. Applications requiring the allocation of frequencies 18. An operator or applicant requiring the allocation of frequencies shall, if- 41