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

https://kameronsinsightfuljournal.publishlane.com/posts/how-do-i-explain-total-thc-to-a-buyer-without-sounding-clueless

The December 11 U.S. hemp rule counts total THC, including THCA, and caps THC at 0.4 mg per container. That narrows eligible products and may shift demand toward THC-free inputs backed by batch lab reports—the clearest compliance path.