Whether the Court should decide pre-emption by looking beyond the Acts' express pre-emption clauses to implied conflict or field pre-emption.
Holding
No. Because Congress expressly addressed pre-emption in § 5 of each Act, the pre-emptive scope is governed by the text of those clauses.
Reasoning
Pre-emption begins with the presumption that Congress does not displace traditional state police powers unless that is Congress's clear and manifest purpose. Congress's purpose remains the ultimate touchstone, and it may be expressed in statutory text or inferred from a statute's structure and purposes.
Here, however, Congress specifically enacted provisions titled and directed to pre-emption. Those provisions supplied a reliable indication of how far Congress intended federal law to displace state authority. The Court therefore rejected the Third Circuit's reliance on implied conflict pre-emption drawn from the Acts' broader purposes and instead identified the domain expressly pre-empted by each version of § 5.