Decisions and orders.

A final decision or order adverse to a party in a contested case shall be in writing or stated in the record. A final decision shall include findings of fact and conclusions of law, separately stated. Findings of fact, if set forth in statutory language, shall be accompanied by a concise and explicit statement of the underlying facts supporting the finding. If, in accordance with the rules of the Sewer District, a party submitted proposed findings of fact, the decision shall include a ruling upon each of the proposed findings. Parties shall be notified either personally or by mail of any decision or order.