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

https://astro-wiki.win/index.php/What_Should_I_Ask_a_Lab_to_Include_So_Total_THC_Is_Crystal_Clear%3F

The Dec. 11 U.S. hemp rule counts total THC, including THCA, and caps it at 0.4 mg per container. It narrows demand for intoxicating hemp products and favors THC-free inputs with batch lab reports as the clearest path to compliance.