(1) Wherever the provisions of this tariff circular do not fully cover all of the points which may arise, the rules of the Interstate Commerce Commission's tariff circulars will apply and the commission hereby adopts the rules promulgated by the Interstate Commerce Commission and the tariff circulars issued by that body when same are not in conflict with the regulations herein.

(2) Wherever tariffs (or concurrences, etc.) having Washington intrastate application are filed also with the Interstate Commerce Commission or with other state commissions, and are in compliance with the applicable tariff circular of the Interstate Commerce Commission or special waivers thereof, the tariffs will be governed only [by] the opening paragraph of WAC 480-149-030 and subdivision (1)(e) thereof of this circular, and the commission hereby adopts in full the rules promulgated by the Interstate Commerce Commission and the tariff circulars issued by that body.