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

https://www.slideserve.com/soltostvly/how-do-u-s-brands-verify-suppliers-and-what-do-they-check-first

The December 11 US hemp rule counts total THC, including THCA, and caps THC at 0.4 mg per container. That narrows demand for products that may exceed the limit. THC-free inputs backed by batch lab reports offer the clearest path to compliance.