A more thorough explanation:

A purpose clause is a statement at the beginning of a law that explains why the law was created and what it is meant to accomplish.

The purpose of this law is to protect endangered species by prohibiting their hunting and trade.

In this example, the purpose clause explains the reason for the law and what it aims to achieve. It states that the law was created to protect endangered species and that it does so by prohibiting their hunting and trade.

The purpose of this regulation is to ensure the safety of workers by requiring the use of protective gear.

In this example, the purpose clause explains that the regulation was created to protect workers and that it does so by requiring the use of protective gear.

Overall, purpose clauses are important because they provide context and clarity to laws and regulations, helping people understand why they exist and what they are meant to accomplish.