Express preemption refers to a legal doctrine where a higher level of government, typically federal, explicitly overrides state or local laws in a specific area. This occurs when Congress passes legislation that clearly states its intention to occupy a field of regulation, preventing states from enacting conflicting laws. It emphasizes the supremacy of federal law in designated matters and helps ensure uniformity across jurisdictions.
congrats on reading the definition of express preemption. now let's actually learn it.