A more thorough explanation:

The Elastic Clause, also known as the Necessary and Proper Clause, is a clause in the United States Constitution that allows Congress to make laws that are "necessary and proper" for carrying out its enumerated powers.

For example, if Congress has the power to regulate interstate commerce, it can use the Elastic Clause to pass laws that are necessary and proper for regulating that commerce, such as laws that establish safety standards for commercial vehicles.

The Supreme Court has interpreted the Elastic Clause broadly, giving Congress the implied power to enact any law that is reasonably designed to achieve an express constitutional power. This means that Congress has a lot of flexibility in how it uses the Elastic Clause to pass laws that are necessary and proper for carrying out its powers.