All final decisions will include a statement of findings and conclusions, as well as the reasons or basis therefor, upon all the material issues presented on the record, and the appropriate rule, order, sanction, relief, or denial thereof. A copy of each decision when issued shall be served on the parties to the proceeding. This provision shall also apply to decisions issued pursuant to subpart T of this part. [Rule 225.] [64 FR 7810, Feb. 17, 1999]