The December 11 US hemp rule counts total THC, including THCA, and caps THC at...

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

The December 11 US hemp rule counts total THC, including THCA, and caps THC at 0.4 mg per container. It narrows demand for intoxicating hemp products and makes THC-free inputs with batch lab reports the clearest path to compliance.