Republic of Bulgaria according to international agreements; 7. five per cent of the lump-sum fee for use of additionally provided radio spectrum; 8. twenty per cent of the fines and pecuniary penalties provided for in this Act; 9. interest on overdue receivables; 10. (repealed, SG No. 17/2009). (2) (Supplemented, SG No. 105/2011, effective 29.12.2011, amended, SG No. 38/2012, effective 1.07.2012) The resources on the budget of the Commission shall be spent on financing of the activity thereof, including on projects related to market regulation and liberalization for participation in the Body of European Regulators for Electronic Communications, on ensuring effective and active control. Article 52. The Commission shall compile and annually, not later than the 30th day of May, shall post on the Internet site thereof an estimate of the expected revenue covered under Article 51 herein, with the exception of the revenue from the administrative fee for control and the relevant expenditures to ensure the activity of the Commission for the next succeeding year, which shall be presented to the Minister of Finance for clearance. Article 53. (1) In case the expected revenue for the relevant year does not cover the expenditures of the Commission, the deficit shall be made up through modifications in the amount of the administrative fee for control. (2) (Amended, SG No. 105/2011, effective 29.12.2011) Annually, not later than the 30th day of September of the current year, the Commission shall propose to the Council of Ministers to adopt an amendment of the Rate Schedule of the fees which are collected by the Commission. The said fees shall be collected as from the 1st day of January of the next succeeding year. Section VIII Resolution of Disputes between Undertakings Article 54. (1) (Amended, SG No. 105/2011, effective 29.12.2011) The Commission shall render assistance or shall issue binding instructions in case of a dispute arising in connection with existing obligations under this Act between undertakings providing electronic communications networks and/or services or between such undertakings and undertakings benefiting from obligations imposed for access and/or interconnection, where any of the aggrieved parties has submitted a written request. (2) The request referred to in Paragraph (1) shall mandatorily state the circumstances on which the said request is based and shall be accompanied by certified copies of documents proving the circumstances set forth and documentary proof of payment of an administrative fee in the cases where binding instructions are requested from the Commission. Article 55. (1) Where the aggrieved party has requested assistance to reaching an agreement, the Commission shall designate a specialized committee by decision within seven days after receipt of the said request. (2) The specialized committee shall hear the opinions of the parties, shall clarify the reasons for which the request has been made, and shall explain the adverse impact of a failure to reach an agreement. (3) If the parties fail to reach an agreement, within thirty days after receipt of the request, each of the aggrieved parties may approach the Commission with a request to issue binding instructions within fourteen days. (4) The procedure for rendering assistance to reach an agreement shall be free of charge. Article 56. (1) Where the aggrieved parties have requested the issuing of binding instructions, the Commission shall designate a specialized committee including at least one qualified lawyer by decision within seven days after receipt of the request. Outside experts may also be recruited to take part in the work of the specialized committee as members or consultants. (2) The specialized committee shall consider the request and the documents attached thereto within