Berk v. Choy · ¶53

In short, our precedents establish that when a state law and a valid Federal Rule conflict—because they answer the same procedural question—the State’s requirement is inapplicable in federal court. Because §6853 answers the same question about what is required to commence a medical malpractice action as the unquestionably valid Rule 3, Delaware’s law must give way. See Hanna, 380 U. S., at 469– 474.

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