The third bright line involves sitting down to eat three abundant, delicious, planned-out meals — no snacks and no grazing all day long. This helps with willpower issues because it becomes a habit to only think about food three times a day, allowing your brain freedom from food and decision making the rest of the day.
This also increases fasting time between eating, which can help control hunger and help you burn fat. This bright line will be difficult to follow at first if you're used to eating between meals. But when you focus on eating enough food at each meal, hunger won't be an issue.