All final decisions and orders of the board of trustees in contested cases shall be in writing and shall be signed by the director. The final decision shall include findings of fact and conclusions of law, separately stated. The date of rendition shall be stated in the decision or order. Parties shall be notified either personally or by mail of any decision or order. On written request, a copy of the decision or order shall be delivered or mailed to any party and to the party's attorney of record.