Written and maintained by CASRAI Editorial Board
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CROSS is the searchable database of rulings that U.S. Customs and Border Protection (CBP) has published. A binding ruling is a written CBP statement applying customs law to a specific set of facts. Searching CROSS costs nothing and shows how CBP has treated similar goods; requesting a ruling is what produces a decision for your own transaction.
Short answer
CBP CROSS (the Customs Rulings Online Search System) is CBP’s database of published rulings, reached from rulings.cbp.gov. A binding ruling is a written statement issued under 19 CFR Part 177 that applies customs law to a specific set of facts. It binds CBP personnel until CBP modifies or revokes it, but 19 CFR 177.9 says no other person should assume its principles will be applied to them. A CROSS letter written for another importer is therefore precedent to read carefully, not a guarantee for your goods.
Definition and scope
What CROSS is
CBP describes CROSS as a database of published rulings and links to it from its rulings page. The same page says CBP issues binding advance rulings and other legal decisions in connection with the importation of merchandise, and that advance rulings offer a transparent and efficient means of understanding how CBP will treat a prospective import (CBP, Rulings).
What a binding ruling is
Under 19 CFR 177.1(d)(1), a ruling is a written statement issued by the CBP Headquarters Office or the appropriate customs office that applies customs law to a specific set of facts. Rulings are issued only for prospective transactions; a transaction already before a customs office is normally resolved by that office (19 CFR 177.1(a)). Oral opinions or advice from CBP personnel are not binding on CBP (19 CFR 177.1(b)).
Search phrases such as “cross rulings”, “cbp binding ruling” and “binding ruling” all point at this same pair of ideas: the database where published rulings are found, and the written decision a requester can ask for.
How it is used in practice
Who may request a ruling
19 CFR 177.1(c) allows any person with a direct and demonstrable interest in the questions presented in the request, or that person’s authorized agent, to ask for a ruling. “Person” includes individuals, companies, partnerships and other groups. CBP’s ruling-letters page uses similar wording and says CBP gives full and careful consideration to written requests from importers and other interested parties who seek a definitive interpretation of applicable law (CBP, Ruling Letters).
Who may rely on a ruling
Under 19 CFR 177.9, a ruling letter is binding on all CBP personnel until modified or revoked, and is generally effective on the date it is issued. The same section states that no other person should rely on the ruling letter or assume the principles of that ruling will be applied to them, and that CBP may modify or revoke it.
Searching CROSS versus requesting a ruling
This checklist is an editorial reading of the regulation text above, not CBP guidance.
| Situation | What the regulation text points to |
|---|---|
| You want to see how CBP has treated similar goods | Search the published rulings in CROSS. A letter issued to someone else is context, not a guarantee for you (19 CFR 177.9). |
| You need a decision that applies to your own goods | A written ruling request from a person with a direct and demonstrable interest, or an authorized agent (19 CFR 177.1(c)). |
| The shipment is future | Rulings address prospective transactions (19 CFR 177.1(a)). |
| The shipment is already before a customs office | The regulation says that office normally resolves it, so a ruling request is not the usual route (19 CFR 177.1(a)). |
| A CBP officer told you something by phone | Oral advice is not binding on CBP (19 CFR 177.1(b)). |
Where it matters for labs and clinics
A ruling answers a question about a specific set of facts, so the facts in the letter decide whether it is useful to you. When you read a CROSS letter for a reagent, consumable or instrument, compare it with your own product on these points before treating it as relevant:
- What the product is and what it is made of, as described in the letter.
- How the goods are used, as the letter states it.
- How the facts in the letter differ from your product, however slightly, since the ruling applies the law to its own facts.
- Whether the letter was issued to you or to another party, because 19 CFR 177.9 says others should not assume the ruling’s principles will be applied to them.
CROSS sits beside other classification and origin questions. See the HS code definition for chemicals for how tariff classification applies to chemicals, substantial transformation for the country-of-origin test, and Section 301 tariffs on medical products for the tariffs that apply to medical products.
Common misunderstandings
“Every CROSS result protects me”
No. Binding status runs to CBP personnel for the situation the letter addresses, and 19 CFR 177.9 tells others not to assume it applies to them.
“A phone answer from CBP is enough”
No. 19 CFR 177.1(b) states that oral opinions or advice of Customs personnel are not binding.
“A ruling is permanent”
No. A ruling remains binding on CBP personnel until modified or revoked, and CBP may modify or revoke it (19 CFR 177.9).
“A ruling can settle a shipment that already arrived”
Rulings are issued only for prospective transactions; a transaction already before a customs office is normally resolved by that office (19 CFR 177.1(a)).
FAQ
What is CBP CROSS?
It is CBP’s database of published rulings, called the Customs Rulings Online Search System, linked from CBP’s rulings page.
What are CROSS rulings?
They are the rulings CBP has published in that database. Each applies customs law to the facts of one request.
What is a CBP binding ruling?
A written statement from CBP applying customs law to a specific set of facts. It binds CBP personnel until modified or revoked (19 CFR 177.1 and 177.9).
What is a binding ruling in customs terms?
The same thing: a written CBP decision on a prospective transaction, as defined in 19 CFR 177.1(d)(1).
Who can ask CBP for a ruling?
Any person with a direct and demonstrable interest in the questions presented, or an authorized agent (19 CFR 177.1(c)).
Sources
- eCFR, 19 CFR Part 177 (Administrative Rulings), sections 177.1 and 177.9, https://www.ecfr.gov/current/title-19/part-177, checked 2026-11-01.
- U.S. Customs and Border Protection, Rulings, https://www.cbp.gov/trade/rulings, checked 2026-11-01.
- U.S. Customs and Border Protection, Ruling Letters, https://www.cbp.gov/trade/rulings/ruling-letters, checked 2026-11-01.
