Electronic sealing requirement becomes mandatory for designated exporters at listed ports; voluntary adoption allowed where readers exist. Implementation of Electronic Sealing is introduced on a phased basis: entitled exporters with RFID e-seals and reader access may voluntarily self-seal without departmental supervision until the transition; thereafter e-sealing becomes mandatory for exporters with prior self-sealing permissions, AEO exporters and supervised-stuffing exporters at specified ports/ICDs, and ultimately for all Full Container Loads at all Ports/ICDs. Customs officers must familiarise themselves with RFID equipment and report implementation difficulties.