Are the four principles in a food guide kind of pamphlet? Are the rules readily available for citizens so that people know why something got picked or not picked in terms of its red light, green light label?
Here, the Health Check program is very much based on our food guide. So people can use the food guide as background and then figure out why—whether it's because of sodium or fat—it was approved or not. What would be the background documentation you would have for your traffic light four principles?