§ 1013. Intervention by permission. Upon timely motion, any person may\nbe permitted to intervene in any action when a statute of the state\nconfers a right to intervene in the discretion of the court, or when the\nperson's claim or defense and the main action have a common question of\nlaw or fact. In exercising its discretion, the court shall consider\nwhether the intervention will unduly delay the determination of the\naction or prejudice the substantial rights of any party.\n
Intervention by permission
N.Y. Civil Practice Law & Rules Law § 1013, under Parties Generally.
N.Y. Civil Practice Law & Rules Law § 1013