not forbid individual States from granting standing to such parties; it only mandates that federal courts may not do so: "The Court does not question [the State's] sovereign right to maintain an initiative process, or the right of initiative proponents to defend their initiatives in [State] courts. But standing in federal court is a question of federal law, not state law. No matter its reasons, the fact that a State thinks a private party should have standing to seek relief for a generalized grievance cannot override this Court’s settled law to the contrary. Article III’s requirement that a party invoking the jurisdiction of a federal court seek relief for a personal, particularized injury serves vital interests going to the role of the Judiciary in the federal system of separated powers. States cannot alter that role simply by issuing to private parties who otherwise lack standing a ticket to the federal courthouse." (Hollingsworth v. Perry) References Article Three of the United States Constitution Clauses of the United States Constitution United States civil procedure