The proposition mandates eggs can only be sold in the state if they come from chickens housed in cages that meet certain size requirements, larger than the typical industry standard.

The California law requires a chicken coop be 60 square feet (five feet by 12 feet) and hold no more than 60 chickens. At that size, an at-capacity cage would allow one square foot per chicken.

But attorneys general from Alabama, Missouri, Nebraska and Oklahoma as well as the governor of Iowa argue that’s too much, and have sued in federal court to block California from imposing the space requirement on eggs shipped in from other states. The lawsuit argues the California law violates the Commerce Clause of the U.S. Constitution.