A more thorough explanation:

Definition: An act of legislation is a formal change in the law that existed previously. It is also known as a statute.

Examples:

• The Civil Rights Act of 1964 was an act of legislation that prohibited discrimination based on race, color, religion, sex, or national origin.
• The Affordable Care Act, also known as Obamacare, was an act of legislation that aimed to provide affordable health insurance to all Americans.

These examples illustrate how acts of legislation can create new laws or modify existing ones. They are formal changes made by the government to address important issues and improve the lives of citizens.