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