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Jurisdiction By Cross-Reference, Lumen N. Mulligan

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State and federal law often cross-reference each other to provide a rule of decision. The difficulties attendant to these cross-referenced schemes are brought to the fore most clearly when a federal court must determine whether such bodies of law create federal question jurisdiction. Indeed, the federal courts have issued scores of seemingly inconsistent opinions on these cross-referential cases. In this article, I offer an ordering principle for these apparently varied, cross-referential, jurisdictional cases. I argue that the federal courts only take federal question jurisdiction over cross-referenced claims when they, from a departmental perspective, maintain declaratory authority over the cross-referenced law. …