According to this article, the 2018 Farm Bill legalized any THC derived from hemp—both delta-8 and its more common variant, delta-9—as long as it constitutes less than 0.3 percent of the overall product. More plainly: hemp-derived weed is federally legal!
Congress Accidentally Legalized Weed Six Years Ago
When lawmakers voted to allow hemp production in 2018, they quietly opened the door to legal THC in all 50 states.
theatlantic.com