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

https://ericksniceblog.zenbloomer.com/posts/when-was-public-law-119-37-signed-and-what-did-it-change

The Dec. 11 US hemp rule counts total THC, including THCA, and caps it at 0.4 mg per container. That narrows eligible products and may shift demand toward compliant formats. THC-free inputs with batch lab reports are the clearest path.