A legal dispute in the US involves a 2018 referendum where California voters banned the sale of pork from pigs not raised under California standards, affecting pigs raised outside of California as well. This led to a lawsuit by the National Porc Producer Council and the American Farm Bureau Federation against the state, arguing the act infringes on free trade and introduces arbitrary animal husbandry standards. They argue these standards could cause economic harm to American pig farmers and consumers, as California's minimum rearing space is larger than the national standard.