(a) The arbitrator shall enter the arbitrator's award not later than the seventh day after the last day of arbitration.
(b) The arbitrator shall base the award on the facts established at arbitration, including stipulations of the parties, and on the law as properly applied to those facts.
(c) The award must:
(1) be in writing;
(2) be signed and dated by the arbitrator; and
(3) include a statement of the arbitrator's decision on the contested issues and the parties' stipulations on uncontested issues.
(d) The arbitrator shall file a copy of the award as part of the permanent claim file at the division and shall notify the parties in writing of the decision.