Classification, origin and valuation questions are usually answered by an opinion: your broker's, your supplier's, or an article like this one. A binding ruling replaces the opinion with the agency's official position, in writing, before you ship. For a product you will import repeatedly, or where the duty difference is large, it is one of the highest-value hours in trade compliance.
General information, not legal advice, and US-specific. Verified against the regulations in August 2026.
What a ruling actually binds
A ruling letter represents CBP's official position on the transaction described, and is binding on all CBP personnel until modified or revoked. Four limits define how far that protection reaches:
- It binds CBP, not you. The obligation runs one way.
- It assumes your facts were accurate and complete in every material respect, and applies subject to verification against the actual transaction. A ruling obtained on an incomplete description protects nothing.
- Its scope is narrow, and differs by subject. A classification ruling covers articles identical to the sample or description. A valuation ruling covers the same merchandise and like facts. A carrier ruling covers identical operations.
- Nobody else may rely on it. A ruling issued to another importer, including everything in the public database, is persuasive research, not protection.
What you can and cannot ask about
Rulings are available on classification, valuation, country of origin, marking, trade programme and free trade agreement eligibility, and carrier and navigation questions. They can also address liquidation of an entry or exclusion of merchandise from entry.
CBP will not issue one where:
- The transaction is already completed or the entry liquidated: rulings are prospective only.
- The question is essentially hypothetical.
- The issue is pending before the Court of International Trade or the Federal Circuit.
You must also have a direct and demonstrable interest in the question. You or your authorised agent, not a curious third party.
Oral advice is worth nothing
Worth stating bluntly because it costs importers real money: CBP will not issue rulings in response to oral requests, and oral opinions or advice from CBP personnel are not binding. A helpful answer at a port, on a call, or at a trade event is not protection. Get it in writing through the proper channel or treat it as informal.
Where to send the request: the part most guides get wrong
There are two channels, and using the wrong one wastes weeks:
| Subject | Where it goes |
|---|---|
| Classification, plus certain marking, origin and trade-programme questions | The eRulings portal, to the National Commodity Specialist Division in New York |
| Valuation (including First Sale) and carrier rulings | CBP Headquarters, Regulations and Rulings, in Washington, not eRulings |
The eRulings template is reserved for electronic submission of initial binding ruling requests to New York. A valuation question submitted there is in the wrong place. That matters directly if you are pursuing a First Sale position. See customs valuation explained.
Two further mechanics: a single request may include no more than five items of the same class or kind, and the request must concern prospective shipments, with the ruling or its control number provided with your entry documents at importation.
How long it takes
- Acknowledgement and a control number within one business day, where the request is received in good order.
- Classification rulings: generally 30 calendar days from receipt.
- Requests handled at Headquarters: 90 days. This is the figure that applies to valuation.
- Delay is likely where a laboratory report or another agency must be consulted.
Treat these as service targets rather than deadlines, the regulation commits CBP only to endeavour to issue a ruling.
Researching before you ask
CROSS, the Customs Rulings Online Search System, publishes issued rulings and is free to search. It is genuinely useful for seeing how CBP has treated comparable goods and for understanding the evidence that succeeded or failed.
Two cautions. Rulings issued to others do not protect you. And a ruling that appears favourable may have been modified or revoked since. Check its current status rather than the text alone.
Rulings can be revoked, and the 60-day line matters
A ruling found to be in error or out of step with CBP's current views may be modified or revoked. How that happens depends on how long it has been in force:
- In effect under 60 days: CBP may modify or revoke by simply giving written notice to the recipient. No publication, no comment period.
- In effect 60 days or more: CBP must publish a notice of proposed action in the Customs Bulletin, allow at least 30 days for public comment, publish a final notice, and the change then takes effect 60 days after publication. You may elect to have it apply to your own transaction immediately.
Two consequences worth planning around. Publication sweeps in rulings that were never named: a final notice modifies any substantially identical ruling, including ones not specifically identified, so holding an unnamed ruling on the same issue is no shelter. And established treatment can itself be revoked even where no ruling exists, based on how CBP actually handled substantially identical transactions over a two-year period.
When it is worth doing
- High duty differential between two plausible classifications, on repeat volume.
- A preferential origin claim you intend to rely on repeatedly: rules of origin.
- A First Sale structure, before you build a supply chain around the saving.
- A novel or borderline product where your broker and your supplier disagree.
- Before a large capital import, where a classification surprise would be material.
Set against that: rulings are prospective, take weeks, and bind only the described transaction. For a one-off low-value shipment they are rarely worth the wait.
Related: HS codes explained, customs clearance and trade compliance, and credentials you can verify yourself.
Find customs brokers who prepare ruling requests, or post a request.
