Under the December 11 US hemp rule, products are measured by total THC,...

https://city-wiki.win/index.php/How_Can_Organic-Certified_Growers_Benefit_from_These_US_Rule_Changes%3F

Under the December 11 US hemp rule, products are measured by total THC, including THCA, and capped at 0.4 mg per container. That narrows eligible products and may shift demand toward THC-free inputs with batch lab reports, the clearest path.