What law mandates that chain restaurants must follow consistent menu labeling regulations nationwide?

The law that mandates chain restaurants to follow consistent menu labeling regulations nationwide is Section 4205 of the Affordable Care Act. This provision requires restaurants and similar retail food establishments that are part of a chain with 20 or more locations to display calorie information for standard menu items. The aim of this regulation is to provide consumers with more information regarding their food choices, ultimately promoting healthier eating habits. The law reflects a broader effort to address issues related to obesity and nutrition, ensuring that patrons can make informed decisions about their meals.

The other options, while related to restaurant food labeling and nutrition, do not specifically create a nationwide standard for menu labeling across chain establishments.