(a) You must provide a child with food that is:(1) Of adequate variety, quality, and in sufficient quantity to supply the nutrients needed for proper growth and development according to the United States Department of Agriculture guidelines; and(2) Appropriate for the child's age and activity level.(b) You must not serve a child nutrient concentrates and supplements, such as protein powders, liquid protein, vitamins, minerals, and other nonfood substances, in lieu of food to meet the child's daily nutritional needs, except with written instructions from a licensed health-care professional.(c) You must ensure drinking water is always available to each child and is served in a safe and sanitary manner. Children must be well hydrated and must be encouraged to drink water during physical activity and in warm weather.