K.S.A. 60-224.Intervention

Intervention gives someone who isn't already a party a way into a pending case. Under subsection (a), the court has no choice but to let the person in if a statute grants an unconditional right to intervene, or if the person claims an interest in the property or transaction at stake and disposing of the case without that person could, as a practical matter, impair the person's ability to protect that interest — unless the existing parties already represent it adequately. That second path is the more commonly invoked one, and it turns on a close look at whether the current parties' interests line up with the would-be intervenor's.

Subsection (b) covers permissive intervention, where the court has discretion instead of an obligation. A statute might grant a conditional right to intervene, or the applicant might have a claim or defense sharing a common question of law or fact with the pending action. Government officers and agencies get a specific path in as well: a court may let an officer or agency intervene when a party's claim or defense rests on a statute or executive order the officer administers, and when a state statute, ordinance, or constitutional provision is challenged in a case the state or subdivision isn't already a party to, the court may notify the state's or subdivision's chief legal officer and allow intervention. Notice to the attorney general under K.S.A. 75-764 triggers a mandatory right to intervene instead of a discretionary one. Whether intervention is granted as of right or permissively, the court has to weigh whether letting the newcomer in will unduly delay or prejudice the existing parties' case.

Getting in requires more than showing up. The motion has to be timely, served on the parties the same way papers are served under K.S.A. 60-205, state the grounds for intervening, and come with a pleading that sets out the claim or defense the intervenor wants to raise.