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

https://kilo-wiki.win/index.php/Does_the_0.4_mg_THC_Cap_Apply_to_the_Whole_Package_or_Per_Serving%3F

The December 11 US hemp rule change counts total THC, including THCA, and caps hemp-derived THC at 0.4 mg per container. That narrows the market for intoxicating products and shifts demand toward compliant, non-intoxicating ingredients