It appears to be state regulated. I'd imagine that different types of stores are regulated different ways (e.g., coop vs. supermarket). http://www.extension.or

It appears to be state regulated. I'd imagine that different types of stores are regulated different ways (e.g., coop vs. supermarket). http://www.extension.org/pages/45117/is-unit-pricing-mandatory-in-large-us-grocery-stores http://www.extension.org/pages/45117/is-unit-pricing-mandato...