IV. Parties

• Rule 17. Plaintiff and Defendant;  Capacity;  Public Officers
• Rule 18. Joinder of Claims
• Rule 19. Required Joinder of Parties
• Rule 20. Permissive Joinder of Parties
• Rule 21. Improper Joinder and Nonjoinder of Parties;  Severance
• Rule 22. Interpleader
• Rule 23. Class Actions
• Rule 23.1. Derivative Actions
• Rule 23.2. Actions Relating to Unincorporated Associations
• Rule 24. Intervention
• Rule 25. Substitution of Parties