Custodian accountability for sealed export container/truck movements ensures liability for shortages and continuity bond debit upon nonexport. Export cargo from CFS Mulund may be transferred in sealed containers or trucks to Amritsar airport after customs assessment and stuffing under supervision; the custodian accepts liability for transit shortages and must execute a bond, with FOB value debited from the custodian's continuity bond. On arrival customs verify seals and documents; intact seals obviate further examination and permit 'let export' endorsements, enabling drawback sanction and forwarding of transference copies for EGM filing and export records.