Administrative Litigation Act Article 37

Two or more persons may sue or be sued as co-parties under the following subparagraphs:1. When the administrative disposition in relation to the claim was rendered jointly by two or more government agencies;2. When the rights, obligations or legal interests of the claim are common to them;3. When the rights, obligations or legal interests of the claim arise from the same or same types of factual or legal grounds;For the joint litigation arising from the same types of factual or legal grounds as prescribed in Subparagraph 3 of the preceding Paragraph, it is required that the defendant's place of domicile or residence, the office of official duty, the government agency, the principal office or principal place of business locates within the jurisdictional boundaries of the same administrative court.