Coastal manifest requirement applies to vessels at import/export berths, mandating pre-arrival or pre-departure filing. Sections 30 and 41 apply to exclusively coastal vessels using berths for import/export traffic, and the person in charge or agent must submit a coastal manifest to the proper officer prior to arrival or departure in the prescribed Form specifying vessel identifiers, voyage and port details, an itemised list of packages with shipper/consignee, cargo description, invoice/challan, container/vehicle and seal numbers, weights, ports of discharge, and a certification declaration of accuracy.