A more thorough explanation:

A sumptuary law is a rule that limits how much money people can spend on things that are considered unnecessary or showy. It can also be a law that regulates behavior that is seen as immoral, like gambling or drug use.

• A sumptuary law might limit how much money someone can spend on clothing or jewelry.
• Another example of a sumptuary law is one that restricts the amount of money people can spend on weddings or funerals.
• Some countries have laws that regulate the amount of alcohol people can drink or the types of drugs they can use.

These examples show how sumptuary laws can be used to control behavior that is seen as excessive or immoral. By limiting how much people can spend on certain things or regulating certain activities, governments can try to promote more responsible behavior and discourage excess.