A more thorough explanation:

Leges sub graviori lege is a Latin term that means "laws under a weightier law." It refers to the principle that when there are conflicting laws, the more important or serious law takes precedence over the others.

For example, if there is a law that says it is illegal to drive over the speed limit, but another law says that emergency vehicles can exceed the speed limit when responding to an emergency, the second law takes precedence because it is more important to save lives than to enforce traffic laws.

Another example is the conflict between state and federal laws. If a state law contradicts a federal law, the federal law takes precedence because it is considered a weightier law.

These examples illustrate the principle of leges sub graviori lege, which means that when there are conflicting laws, the more important or serious law takes precedence over the others.