MBE Rules · Civil Procedure
Rule 24 — intervention
FRCP 24
The rule
Intervention of right (24(a)) is granted when the intervenor claims an interest in the subject matter, disposition may impair that interest, and existing parties inadequately represent it. Permissive intervention (24(b)) may be granted when the intervenor's claim shares a common question of law or fact with the main action, in the court's discretion.
In plain English
Intervention lets an outsider force their way into pending litigation. §1367(b) blocks supplemental jurisdiction for intervenors in diversity-only cases if it would destroy complete diversity.
The trap
Forgetting the §1367(b) diversity bar on intervenors.
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