I don't think Olimex understands tariffs. Maybe they shouldn't have to. But you don't have to specify the breakdown of your PCB by mineral content. That's what the harmonized tariffs schedules are all about, to account for this very issue.

But then why are CBP (via the shippers) demanding a certificate of analysis rather than just referring people to the HTS? I know a lot of people in the synthesizer industry, and where previously they would just refer to the HTS classification for musical instruments there's a lot confusion about the recently announced 100% tariff on foreign made semiconductors. Since virtually every synth uses semiconductors and a great deal of the trade is in boutique products with relatively low manufacturing volumes, the uncertainty is creating major headaches on top of the headaches caused by the shipping puases.

Sorry bud, but I don’t think you’re aware of section 232. It became effective on August 1.

https://www.cbp.gov/trade/programs-administration/entry-summ...