U.S. Diamond-Origin Rules: Country-of-Mining Field Pending, Self-Certification Still Required

U.S. Customs and Border Protection has postponed implementation of the ACE country-of-mining data field for diamond imports. The current ACE deployment schedule still lists the relevant Russian-sanctions data-collection enhancement as TBD, so importers should not treat the country-of-mining field as an active filing requirement until CBP activates it.

The postponement does not change the Russian-diamond import ban. Under OFAC rules, in-scope non-industrial diamonds are prohibited if they were mined, extracted, produced, or manufactured wholly or in part in Russia, even if they were later cut, faceted, polished, or substantially transformed in another country. Diamonds of Russian origin are prohibited regardless of weight; a stone mined in Russia and cut in India remains prohibited where it meets the applicable carat threshold for third-country-processed goods (1.0 ct from 1 March 2024, 0.5 ct from 1 September 2024).

Importers must continue filing the applicable ACE/DIS self-certification for affected diamond entries and should keep documentation supporting the declared non-Russian origin or any grandfathered-goods authorization. Self-certification without supporting records is a compliance risk, not a safe harbor.