Under such rules and regulations as the Commission may prescribe, every electrical utility shall file with the Commission, within such time and in such form as the Commission may designate, schedules showing all rates, service rules and regulations and forms of service contracts established by it and collected or enforced or to be collected or enforced within the jurisdiction of the Commission. Under such rules and regulations as the Commission may prescribe, every distribution electric cooperative and consolidated political subdivision shall file with the Commission, for information purposes, within such time and in such form as the Commission may designate, schedules showing all rates, service rules and regulations and forms of service contracts established by it. Each electrical utility, distribution electric cooperative, and consolidated political subdivision shall keep copies of such schedules open to public inspection under such rules and regulations as the Commission may prescribe.