(1) Unless otherwise specified in the decision or order in the case, such tariff or supplement must be made effective upon statutory notice to the commission and to the public.

(2) Whether made effective on less than statutory notice under special authority granted in the decision or order in the case, or upon statutory notice, when an entire tariff or supplement is issued in compliance with a decision or order, such tariff or supplement shall bear on its title page the notation: "In compliance with Authorization No. of the Montana Public Service Commission, date."