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

https://scarlettsimpressiveword.lumenforgex.com/posts/why-would-hemp-flower-pass-before-but-fail-now

The December 11 U.S. hemp rule counts total THC, including THCA, and caps THC at 0.4 mg per container. That narrows the market for many hemp-derived products and may shift demand toward formulations that can meet the limit