Reviewed by Sasha Božič, Licensed Customs Broker

A binding ruling is a written decision from CBP, under 19 CFR Part 177, on how a specific product will be treated when it is imported: its HTS classification, country of origin, valuation or eligibility for a trade program. It binds CBP at every port for that product. Importers request rulings when the classification is uncertain and the duty difference is large.
Requests are usually filed online through CBP's eRulings system. CBP generally aims to answer classification requests within 30 days, though complex requests can take longer. Published rulings are searchable in CBP's CROSS database, which is also the place to research how similar products were classified.
Can I use someone else's ruling? A ruling binds only for the requester, but published rulings are strong evidence of how CBP classifies similar goods.
Does a ruling fix past entries? No. Past entries are corrected through a Post-Summary Correction or a protest.
Caspian's classification team reviews your catalog, flags products where a ruling is worth requesting, and prepares the request. See HTS classification services.
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