The December 11 U.S. hemp rule change counts total THC, including THCA, and...

https://donovanssuperbnews.cavandoragh.org/cbd-isolate-vs-broad-spectrum-distillate-which-is-safer-for-compliance

The December 11 U.S. hemp rule change counts total THC, including THCA, and caps THC at 0.4 mg per container. That narrows the market for intoxicating hemp products and increases demand for inputs that can meet the limit