The December 11 hemp law counts total THC, including THCA, and caps it at 0.4...

https://en.mercopress.com/2026/10/14/new-us-hemp-rules-take-effect-december-11-shifting-demand-for-south-american-exporters

The December 11 hemp law counts total THC, including THCA, and caps it at 0.4 mg per container. That cuts demand for intoxicating hemp products and shifts buyers toward THC-free inputs with batch lab reports, the clearest path to compliance.