The Dec. 11 U.S. hemp rule 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 Dec. 11 U.S. hemp rule counts total THC, including THCA, and caps it at 0.4 mg per container. That narrows demand for intoxicating hemp products and favors THC-free inputs backed by batch lab reports—the clearest compliance path.