Answer first
Core rule
Answer first: Part 149 applies to cargo arriving by vessel and assigns duties by shipment type. For ordinary U.S.-bound cargo, the importer supplies ten elements: eight are generally due no later than 24 hours before lading, while container-stuffing location and consolidator are due as early as possible and generally no later than 24 hours before arrival; when the voyage to the closest U.S. port is shorter than 24 hours, the later pair is due upon lading. The separate “+2” refers to carrier data, not the importer's later pair. FROB, IE, and T&E cargo use the five-element rule. Under §149.2(d), the submitting party must update changed or more accurate information that becomes available after filing and before the goods enter a U.S. port; the flexible elements in §149.2(f) have their own final-update clock. An authorized agent may transmit, but the regulation still assigns responsibility to the ISF Importer. October 2026 answers use the 2025 Annual CFR; current CBP FAQs are operational guidance, not a substitute exam edition. CBLE Ace currently has no dedicated verified PGA question pool for this topic; route practice to the general practice page and keep verification status pool-insufficient.
Authority and lookup route
Locate the rule before returning to the facts. Links point to government or official publications.
Reference lookup task
Create a timing matrix for ordinary U.S.-bound cargo, FROB/IE/T&E, container-stuffing and consolidator data, updates, and withdrawal.
Route: Read §149.1 for the responsible party, §149.2 for clocks and updates, §149.3 for elements, and §149.5 for agents.
Worked example
For ordinary U.S.-bound containerized cargo, all eight early importer elements are known before lading, but the final stuffing location and consolidator are not yet known.
- 1Classify the shipment as ordinary U.S.-bound cargo rather than FROB, IE, or T&E.
- 2Transmit the eight early elements no later than 24 hours before lading.
- 3Submit stuffing location and consolidator as early as possible and generally no later than 24 hours before arrival; if the voyage to the closest U.S. port is under 24 hours, submit them upon lading.
- 4If other filed information changes or becomes more accurate before the goods enter the U.S. port, update it under §149.2(d); separately apply §149.2(f) to any flexible elements.
Conclusion: Do not delay the eight pre-lading elements; use the separate later deadline for stuffing location and consolidator, then update as required.
Common traps
- Applying ISF to every transportation mode instead of vessel-arriving cargo.
- Applying the ordinary ten-element rule to FROB, IE, or T&E without checking §149.3.
- Waiting until arrival to file all ordinary U.S.-bound elements.
- Treating use of an agent as a transfer of all ISF Importer responsibility.
- Recording mastery despite the absence of a dedicated verified ISF pool.