(1) In addition to the tariffs required in ARM 38.5.3705, interexchange carriers must maintain a separate set of price lists on file with the commission, which contain the names of all intrastate regulated telecommunications services offered in Montana, a reference to the section or page number where the service is located in the tariff, and the actual rate charged consumers.

(2) The rate in the price list can never exceed the "maximum allowable rate" contained in the approved tariff for the service. The price list rates shall be the only rates lawfully charged consumers.

(3) Price lists cannot alter the terms and conditions contained in the tariff for the service.

(4) Price lists must be filed and maintained as "schedules" in Sec. 69-3-301 , MCA.