The December 11 US hemp rule change 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 US hemp rule change counts total THC, including THCA, and caps it at 0.4 mg per container. That puts many intoxicating hemp products outside the new limit and is likely to reduce demand for THC-rich inputs