A little-noticed provision tucked into the federal spending bill signed by Trump could upend a booming industry – by banning many THC-infused products, like gummies, drinks, topical pain relief and vapes, now found everywhere from gas stations to wellness shops.

Hemp, a derivative of the cannabis plant, was legalized in the 2018 Farm Bill. It created a loophole for THC to be sold in low doses and explode in the mainstream consumer market.

The new ban tucked into the spending bill prohibits products containing more than 0.4 milligrams of THC per container.

Now, the hemp industry says the consequences will be devastating. The U.S. Hemp Roundtable warns that the decision “threatens to eliminate America’s $28.4 billion hemp industry and jeopardizes more than 300,000 American jobs.” The group estimates the move would wipe out 95% of the market, shut down small businesses and farms nationwide, and cost states $1.5 billion in tax revenue.