has not indicated its approval of the proposed tariffs. (2) The Commission may reject an application for the imposition of proposed tariffs if it is of the view that the proposed rates are unjustifiable. (3) A decision of the Commission rejecting the imposition of proposed tariffs shall (a) be in writing; (b) state the reasons for the rejection; and (c) be made available to the licensee. (4) Upon approval by the Commission of any new tariffs, a licensee shall notify its customers of the new tariffs through publication in the Gazette or in such other publications as the Commission may determine and shall in such notice provide for a grace period of not less than fourteen days before implementing the new tariffs. Investigation and suspension of tariffs. 95. (1) The Commission may, on its own motion or pursuant to a complaint made under this regulation, investigate any tariffs charged by a licensee. (2) An application for investigation, suspension or rejection of any tariffs brought under subsection (1) shall(a) be in writing; (b) specify the name and address of the petitioner and state the interest of such petitioner; and (c) the reasons why such tariffs should be investigated, suspended or rejected. (3) Where after the investigations, the Commission is of the view that the tariffs should be suspended or rejected, it may reject or suspend such tariffs; 67