(1) Following the close of hearing or other proceeding which allows the parties an opportunity for hearing, the hearing examiner shall prepare a proposed order consisting of findings of fact, conclusions of law and recommended relief. Copies of the proposed order shall be served upon all parties of record.

(2) A hearing examiner may render an opinion of law in lieu of detailed references to authority in the making of conclusions of law.

(3) The proposed order shall substantially comply with the provisions of 2-4-623 , 49-2-506 , 49-2-507 , 49-3-309 , and 49-3-310 , MCA with respect to final orders.