What amendment to the Constitution does the legislation enforce?

Your question seems a bit broad, as the United States Constitution has several amendments, and legislation can be passed to enforce different provisions of the Constitution. However, I'll provide a general overview:

The Constitution itself doesn't always explicitly outline the specific laws or regulations needed for its implementation. Instead, it provides a framework, and Congress passes legislation to carry out or enforce constitutional principles.

For example:

• The Civil Rights Act of 1964 was enacted to enforce the 14th Amendment's equal protection clause, addressing issues of racial discrimination.
• The Voting Rights Act of 1965 aimed to enforce the 15th Amendment, ensuring that the right to vote could not be denied based on race or color.
• The Americans with Disabilities Act (ADA) was passed to enforce the 14th Amendment's equal protection clause by prohibiting discrimination based on disability.

These are just a few examples, and different legislation may enforce different aspects of the Constitution. If you have a specific amendment or area of the Constitution in mind, please provide more details, and I'll be happy to give a more focused answer.