Generally speaking, a Normal carb day has double the amount of calories of a carb-restricted day. This means that half of your Normal carb day calories can be refined carbs.

For example, if your Normal carb day calories are 3400, you can eat approximately 1700 calories of refined carbohydrates.

There is a group of people who are "carbs-sensitive" (some of their genes have genetic variations that alter the metabolism of glucose). They tend to easily gain fat compared to other people who can eat carbs and get away with it. They should be cautious even on normal carb days, and eat no more than a moderate amount of carbs (200-350 g). They should consume moderate amounts of carbs on every day of the week and concentrate on calorie cycling.

Good question! 

On the first carb-restricted day, you can have a little bit more carbs for breakfast.  This will put you on Level A.  On the following days, you should be able to continue with Level B or C.