(a) Every common carrier of passengers by motor vehicles subject to the jurisdiction of the Commissioner of Transportation (commissioner or department) shall file with the department tariffs showing the fares, rates, and charges applicable to the transportation of passengers between points within this State on routes over which vehicles of such carrier are operated, together with all rules and regulations and general privileges and facilities granted or allowed which apply in connection therewith.

(b) All tariffs on file with the department and currently effective shall continue in force until changed as provided in this Part. All such tariffs hereafter filed shall conform with this Part. The department may direct the reissue or modification of any tariff at any time.