Retention of seized property: sealed forwarding, acknowledgement slips and mandatory retention until related proceedings conclude. The authorised officer must index and sign the copy of the retention order and material, enclose Form I inside a sealed inner envelope marked confidential, place that within a sealed outer envelope with Form II, record dispatch details and maintain registers. The Adjudicating Authority or its designated officer returns Form II on receipt and returns Form I after opening; the Adjudicating Authority must keep the order and material for a long-term period or until related adjudication or appellate proceedings are finally disposed, and maintain receipt registers.