(a) After consideration of a proposal for decision, the executive secretary shall prepare a written final order documenting the Commission's decision on the proposal for decision. A final order must include findings of facts and conclusions of law, separately stated.(b) A final order of the Commission must be signed by a majority of the members of the Commission who voted in favor of issuing the order.(c) The executive secretary shall serve a copy of the final order on each party or the party's representative and each non-party participant.(d) A final order of the Commission takes effect on the date the order is issued, unless otherwise stated in the order.