Starting December 11, the US hemp rule counts total THC, including THCA, when...

https://en.mercopress.com/2026/10/14/new-us-hemp-rules-take-effect-december-11-shifting-demand-for-south-american-exporters

Starting December 11, the US hemp rule counts total THC, including THCA, when determining whether a product qualifies as hemp. It also sets a cap of 0.4 mg of THC per container