(a) Under regulations the commission shall adopt, every public utility shall file with the commission, within the time and in the form the commission designates, its complete tariff showing all rates, including joint rates, tolls, rentals, and charges collected and all classifications, rules, regulations, and terms and conditions under which it furnishes its services and facilities to the general public, or to a regulated or municipally owned utility for resale to the public, together with a copy of every special contract with customers which in any way affects or relates to the serving utility's rates, tolls, charges, rentals, classifications, services, or facilities. The public utility shall clearly print, or type, its complete tariff and keep an up-to-date copy of it on file at its principal business office and at a designated place in each community served. The tariffs shall be made available to, and subject to inspection by, the general public on demand.

(b) The tariffs of a public utility which are also subject to the jurisdiction of a federal regulatory body shall correspond, so far as practicable, to the form of those prescribed by the federal regulatory body.

(c) The commission may reject the filing of all or part of a tariff that does not comply with the form or filing regulations of the commission. A tariff or provision so rejected is void. If the commission rejects a filing, it shall issue a statement of the reasons for the rejection. Unless the utility and the commission agree to an extension of time, the commission may not reject a filing under this subsection after 45 days have elapsed from the date of filing.

(d) The commission may require a telecommunications carrier to make tariff filings related to telecommunications services provided to inmates in the custody of the Department of Corrections. Notwithstanding (a) - (c) of this section, the commission may not require a telecommunications carrier to make other tariff filings.