The Dec. 11 US hemp rule counts total THC, including THCA, and caps it at 0.4...

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

The Dec. 11 US hemp rule counts total THC, including THCA, and caps it at 0.4 mg per container. That narrows demand for intoxicating products. THC-free inputs backed by batch lab reports are the clearest path for brands seeking to stay compliant.