The council‘s decision on an application for certificate of need, when announced pursuant to section 135.69, is a final decision. Any dissatisfied party who is an affected person with respect to the application, and who participated or sought unsuccessfully to participate in the formal review procedure prescribed by section 135.66, may request a rehearing in accordance with chapter 17A and rules of the department. If a rehearing is not requested or an affected party remains dissatisfied after the request for rehearing, an appeal may be taken in the manner provided by chapter 17A. Notwithstanding the Iowa administrative procedure Act, chapter 17A, a request for rehearing is not required, prior to appeal under section 17A.19.