The December 11 U.S. hemp rule counts total THC, including THCA, and caps...

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

The December 11 U.S. hemp rule counts total THC, including THCA, and caps finished products at 0.4 mg per container. That narrows compliant options and may shift demand toward THC-free inputs backed by batch lab reports—the clearest path for brands.