Final answer:
Self-serve rules such as 'Do not reuse plates and utensils' are important for food safety and hygiene.
Step-by-step explanation:
The self-serve rules, like 'Do not reuse plates and utensils,' mentioned in the question are related to food safety and hygiene. It is important to follow these rules in order to prevent the spread of germs and maintain cleanliness in self-serve settings. By using single-use plates and utensils, the risk of contaminating food and causing illness can be minimized.