When ordered by the Commission after a hearing, any electrical utility, distribution electric cooperative, or consolidated political subdivision, may be required to establish, construct, maintain and operate any reasonable extension of its existing facilities. If any such extension, however, will interfere with the service or system of any other electrical utility, distribution electric cooperative, or consolidated political subdivision, the Commission may, on complaint and after hearing, either order the discontinuance of such extension or prescribe such terms and conditions with respect thereto as may be just and reasonable. Each electrical utility, distribution electric cooperative, and consolidated political subdivision, within areas assigned to it by the Commission and within three hundred feet of its lines, as defined in Section 58-27-610, shall be obligated to comply with all requests for service in accordance with its schedules of rates and service rules and regulations on file with the Commission.