conflict preemption

Conflict preemption occurs when federal law overrides or supersedes state or local laws, preventing them from taking effect or enforcing certain provisions. This typically happens when federal law explicitly exists in a way that it intends to occupy a specific regulatory area, leaving no room for state or local regulation. The purpose is to maintain national consistency and prevent conflicting rules that could create confusion or barriers. In essence, if federal law conflicts with a state law, the federal law generally takes precedence, and the state law is preempted or overridden.