Confidential transmission of arrest orders: prescribed sealed dispatch, acknowledgement slips, and mandatory retention for pending proceedings. Rules require the Arresting Officer to index and seal the copy of the arrest order and material, include prescribed acknowledgement slips (Form I inside, Form II with outer envelope), mark envelopes confidential with dispatch reference, and maintain registers. The Adjudicating Authority or its designated officer must acknowledge receipt by returning Form II and, after opening, return Form I with office seal and signature. The Adjudicating Authority must retain the copy of the arrest order and material for the prescribed retention period and longer where related proceedings or appeals remain pending.