Unless a different time is prescribed by the commission, every order of the commission shall be effective within thirty (30) days after the service thereof. Straightway after the entry of record of any order of the commission, notice thereof shall be given to every party required to obey the order. At any time after the entry thereof the commission in the manner provided for the making thereof may alter, amend, annul or otherwise modify any order.
W.S. 37-2-213