Postal authority obligations require presenting imported parcels to customs, no opening or delivery without customs clearance, and electronic reporting. Obligation of Postal Authority requires that on arrival goods be handled only as directed by Customs; receptacles may not be opened without Customs permission; all imported parcels and a list must be presented for screening, inspection and assessment; delivery is not permitted without a Customs clearance order; for cleared goods the Postal Authority must report delivery, duty collection and payment to Customs electronically by the seventh day of the following month; secure transfer must be provided where transshipment is required.