All orders or decisions of the commission shall become operative and effective upon service of the order or decision, in accordance with the provisions of subsection (a) of Kan. Stat. Ann. §§ 77-530 and amendments thereto, unless otherwise ordered by the commission or a stay is granted. The commission may grant a stay or suspend, in whole or in part, the operation of any order or decision of the commission in accordance with the provisions of Kan. Stat. Ann. §§ 77-528 and amendments thereto. After the lapse of the time period in which judicial review of such order may be taken, such determinations and orders shall be held to be conclusive as to the matters involved in any suit to enforce such order or in any collateral suit or proceedings.