Conflicts Between Prop 65 and Federal Law: Can Prop 65 be Preempted?
Requirements under Proposition 65 are typically more stringent than federally mandated regulations. When warning requirements under Proposition 65 conflict with a federal law or federal policy, the courts must determine which legal scheme prevails. The California Supreme tackled this issue in 2004 and laid the groundwork for the basic principles governing inconsistencies between state mandated Proposition 65 rules and federally based regulations. Dowhal v. SmithKline Beecham Consumer Healthcare, 32 Cal. 4th 910 (2004) was the first case in which the California Supreme Court ruled on the issue of federal preemption of the Proposition 65 warning requirement. In the case, the…