The Automated Manifest System is the electronic channel through which U.S. Customs and Border Protection collects advance cargo data on every international shipment bound for the United States. Ocean, air, rail, and truck carriers all transmit manifest information to CBP before their cargo reaches a U.S. port, on deadlines that range from 24 hours before loading at a foreign seaport to 30 minutes before a truck rolls up to the border. Missing a deadline or filing bad data starts at $5,000 per violation under the international carrier bond and can double for repeat offenders under civil penalty statutes. AMS now sits inside the Automated Commercial Environment (ACE), CBP’s single electronic window for trade processing.
Who Has to File
The Trade Act of 2002 requires electronic advance manifest filing for every mode of commercial transport entering the United States. That covers ocean carriers, airlines, railroads, and trucking companies. It also reaches parties who are not the incoming carrier: non-vessel operating common carriers (NVOCCs), freight forwarders, and deconsolidators may file their own shipment data directly with CBP, and many do so to keep control over sensitive client information.
Whoever files has to be authorized in CBP’s systems first. Ocean and truck carriers need a Standard Carrier Alpha Code (SCAC), a two-to-four-letter identifier issued by the National Motor Freight Traffic Association. Airlines use IATA or ICAO designator codes. Deconsolidators and entry-filer freight forwarders holding a valid customs bond can transmit house-level air shipment data independently of the master airway bill filed by the incoming carrier.
Filing Deadlines by Transport Mode
Deadlines are the heart of AMS compliance. CBP applies a different advance window to each mode, and a late filing can trigger a Do Not Load directive that stops the shipment before it ever leaves the foreign port.
Ocean Cargo
The “24-Hour Rule” requires the electronic manifest to reach CBP at least 24 hours before cargo is loaded onto the vessel at the foreign port. Bulk and break bulk cargo follow a modified timeline: instead of filing 24 hours before loading, carriers must file 24 hours before the vessel arrives in the United States. Any containerized cargo riding on those same vessels still follows the standard 24-hours-before-loading rule.
Air Cargo
Air manifest deadlines depend on the flight’s origin. For flights from Mexico, Central America, the Caribbean, Bermuda, and South America north of the equator, CBP must receive the cargo data no later than wheels-up, the moment the aircraft departs for the United States. For flights originating anywhere else in the world, the deadline is four hours before arrival in the United States.
Rail
Rail carriers must transmit manifest data at least two hours before the cargo reaches the first U.S. port of arrival.
Truck
Truck manifest data must arrive at CBP either 30 minutes or one hour before the carrier reaches the first port of arrival, depending on which CBP-approved electronic system the carrier uses to transmit the filing.
What Goes on the Manifest
A complete AMS manifest draws from the commercial invoice, packing list, and bill of lading. Data fields vary by mode, but the ocean manifest is representative. Public data fields for an ocean AMS filing include the bill of lading number; the full legal names and addresses of the shipper, consignee, and any notify party; container and seal numbers; a specific cargo description (vague labels like “general cargo” or “STC” will get the filing rejected); carrier code, vessel name, country code, voyage number, and estimated arrival date; and weight, quantity, and piece count in consistent units.
These fields come from 19 CFR 103.31. The cargo declaration must cover every piece of inward foreign cargo on the vessel regardless of where the goods will eventually discharge, and any foreign cargo remaining on board has to be separately identified. Goods that qualify as hazardous materials under international standards must be flagged in the electronic submission. Every filer needs a valid carrier identifier so CBP can attribute filings to the correct party and track compliance history.
How Long to Keep the Records
Filing does not end the paperwork obligation. Under 19 CFR 163.4, most customs records must be kept for five years from the date of the entry or the activity that created the record. Carriers handling manifested cargo exempt from formal entry get a shorter two-year window. Packing lists have their own rule: keep them for 60 calendar days after the end of the release or conditional release period, whichever comes later. A CBP redelivery demand resets the clock to 60 days from the redelivery deadline.
The Extra Ocean Obligation: Importer Security Filing
Ocean shipments carry a second filing obligation beyond the carrier’s manifest. The Importer Security Filing, commonly called “10+2,” requires the importer or their agent to submit shipment data separately from the carrier’s manifest. ISF applies only to ocean cargo. Air, rail, and truck shipments are not subject to it.
The importer must provide eight data elements no later than 24 hours before the cargo is loaded onto the vessel: seller; buyer; importer of record number (or FTZ applicant ID); consignee number; manufacturer or supplier; ship-to party; country of origin; and commodity HTSUS number at the six-digit level. Two more elements, the container stuffing location and the consolidator, must be submitted as early as possible and no later than 24 hours before the vessel arrives at a U.S. port. Foreign cargo remaining on board, immediate exportation, and transportation-and-exportation shipments follow a shorter list of five elements.
A late, inaccurate, or missing ISF can trigger liquidated damages of $5,000 per violation. If no bond is in place, CBP will withhold release of the cargo entirely until the required information is received and reviewed. Cargo unladen without permission may be subject to seizure.
The Bond Behind the Filing
You cannot file manifests without the right bond. The international carrier bond, governed by 19 CFR 113.64, backs a carrier’s advance cargo information obligations. Under its terms, the carrier and surety agree to pay liquidated damages of $5,000 for each manifest violation, up to $100,000 per conveyance arrival. NVOCCs and slot charterers that elect to file their own cargo data face the same $5,000-per-violation exposure under the same bond provision.
ISF filings are covered by a separate bond condition in Appendix D to 19 CFR Part 113, also at $5,000 per violation. Air carriers participating in the Air Cargo Advance Screening (ACAS) program operate under their own bond condition requiring compliance with Do Not Load instructions, again $5,000 per violation up to $100,000 per arrival.
Status Codes and Do Not Load Instructions
Once CBP receives a manifest filing, the system generates disposition codes that tell the carrier and other authorized parties what is happening with each shipment. Carriers monitor these codes closely because they dictate whether cargo can move or must be held. Common notifications include 1C (Entered and Released, though still held if separate holds exist on the bill), 1A (Intensive Examination Required), 1B (Released After Examination, subject to any remaining holds), 7H (Non-Intrusive Inspection Ordered), and 4A (Override, meaning a previous release has been reversed and the cargo cannot move).
A Do Not Load instruction is the most severe pre-departure action CBP can take. When issued, the party with physical possession of the cargo must comply immediately and cooperate with law enforcement directions. Carriers that file manifest data are required to maintain a phone number and email address monitored around the clock so CBP can reach them when a DNL or hold instruction goes out.
Penalties for Non-Compliance
Manifest violations trigger two penalty tracks that can stack. The first is liquidated damages under the carrier’s customs bond: $5,000 for each violation, capped at $100,000 per conveyance arrival. The second runs under 19 U.S.C. 1436. Any master, vehicle operator, or pilot who fails to comply with manifest requirements or submits false or altered documents is subject to civil penalties of $5,000 for the first violation and $10,000 for each subsequent violation, and the conveyance itself can be seized.
Unmanifested articles face a separate consequence. Goods that should have been listed on the manifest but were not are subject to forfeiture, and the vessel’s master faces a penalty equal to the value of those articles under section 584 of the Tariff Act of 1930. A single container of high-value goods left off the manifest can generate a penalty far exceeding the standard per-violation fine.
How to Contest or Reduce a Penalty
CBP does not expect every penalty to stick at full value. Carriers and importers who believe a penalty should be reduced or cancelled can file a written petition with the Fines, Penalties, and Forfeitures Officer identified in the notice of claim. The petition must be submitted within 60 days of the date the notice was mailed, though extensions are available in warranted circumstances.
The petition itself has no required form but must include the date and place of the violation and the facts relied on to justify cancellation or reduction. For ISF-related liquidated damages, CBP’s mitigation guidelines set concrete ranges: a first violation may settle for between $1,000 and $2,000, depending on mitigating or aggravating factors, and subsequent violations carry a floor of $2,500. If CBP determines the violation did not compromise law enforcement goals, the claim can be cancelled at those reduced amounts. If law enforcement goals were compromised, no relief is granted.
A petitioner who disagrees with the initial decision can file a supplemental petition within 60 days of the decision notice. If the Fines, Penalties, and Forfeitures Officer determines the underlying violation never actually occurred, the case can be cancelled outright with no payment required.