(a) On receiving the investigation report, the commission shall:
(1) make findings of fact; and
(2) issue a written decision incorporating:
(A) its findings; and
(B) an order vacating, affirming, modifying, or terminating:
(i) the notice or order; or
(ii) the modification, vacation, or termination of the notice or order.
(b) If the application for review concerns a cessation order issued under Section 134.161 or 134.162, the commission shall issue the written decision not later than the 30th day after the date it receives the application for review unless it grants temporary relief under Section 134.171.