The college administrator who acts as presiding officer shall issue a written decision which shall include a brief statement of the reasons for the decision and a notice that judicial review may be available. All documents presented, considered, or prepared by the presiding officer shall be maintained as the official record of the brief adjudicative proceeding. A decision must be promptly rendered after the conclusion of the brief adjudicative proceeding and in no event later than twenty days after the request for a brief adjudicative proceeding is received by the dean.