Berk v. Choy · ¶57

In short, our precedents establish that when a state law and a valid Federal Rule confict—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, Dela- ware's law must give way. See Hanna, 380 U. S., at 469–474.

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