The Dec. 11 US hemp rule counts total THC, including THCA, and caps THC 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 US hemp rule counts total THC, including THCA, and caps THC at 0.4 mg per container. That narrows the compliant product pool and may shift demand toward THC-free inputs backed by batch lab reports, the clearest path for brands.