After the time for filing exceptions and replies to exceptions expires, the administrative law judge's proposal for decision will be considered by the commissioner and either adopted or modified. All final decisions or orders of the commissioner shall be in writing and signed. 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 findings. Party representatives shall be simultaneously notified either personally, by certified mail, by email, or by facsimile transmission of each decision or order.