Duty bond requirement for warehoused imports secures payment obligations and covers movement, storage accounting and recovery mechanisms. Amendment requires an importer to execute a duty bond at the customs station of import for warehoused goods equal to three times the duty assessed; the bond covers movement to and between warehouses, accounting during storage, continues until clearance for home consumption or export, and may be enforced and recovered by customs officers. The circular prescribes consignment and general bond formats and supersedes the earlier 1978 bond formats.