68 (cc) the notification to the Authority of changes in the places, aircraft, ships or vehicles at or in which radio stations in respect of which licences are issued, are established, installed or worked; (dd) the proper exercise by the Authority of the powers of control of and supervision over radiocommunication services conferred upon it by this Act and of the other powers, functions and duties conferred or imposed upon it by this Act; (ee) the procedures to be followed by the Authority, the Board or a committee of the Board for mediating disputes between licensees; (ff) in relation to the provision of reserved services or articles⎯ (i) the rates of postage payable on reserved postal articles; (ii) the redirection of reserved postal articles and the transmission by post of postal articles so redirected free of charge or subject to a prescribed charge; (iii) the charges to be paid for registration of reserved postal articles; (iv) the charges to be paid for insurance of reserved postal articles; (v) the rates of commission or the charges to be charged on and in respect of reserved money orders; (vi) the rates of commission to be charged on reserved postal orders; (vii) the rates at which and the conditions and restrictions subject to which⎯ A. messages shall be transmitted by a reserved telegraph service; B. messages transmitted by a reserved telegraph service shall be delivered; (viii) the charges for searching for telegrams or documents relating to telegrams that are in the custody of telegraph officers employed by a reserved telegraph service; (ix) the charges with respect to reserved agency services; (x) the charges with respect to any service reserved in terms of subsection (4) of section one hundred and six; (4) Subject to subsection (5), before making regulations in terms of paragraph (ff) of subsection (3), the Minister shall consult the Minister responsible for finance: Provided that the Minister shall not be required to consult the Minister responsible for finance in the case of any regulations the effect of which is solely— (a) to alter any prices, rates or charges in order to conform with changes made by countries outside Zimbabwe; or (b) to fix charges and costs in connection with the supply, installation, working, maintenance or repair or any work done for the purposes of the installation of apparatus or equipment supplied, installed, worked, maintained or repaired by the appropriate successor company. (5) Where the appropriate successor company proposes to increase any tariff for the provision of any reserved agency, postal or telecommunication service, and the Minister gives no written indication to the appropriate successor company of his intention to implement a specified alternative to the proposed increase within thirty days after the appropriate successor company first notified him in writing of the proposal, such increase shall be deemed to have been approved