A telecommunications carrier may petition for waiver of the application of a rule issued pursuant to this Act. The burden of proof in establishing the right to a waiver shall be upon the petitioner. The petition shall include a demonstration that the waiver would not harm consumers and would not impede the development or operation of a competitive market. Upon such demonstration, the Commission may waive the application of a rule, but not the application of a provision of this Act. The Commission may conduct an investigation of the petition on its own motion or at the request of a potentially affected person. If no investigation is conducted, the waiver shall be deemed granted 30 days after the petition is filed.