Administrative Litigation Act Article 30

The representative parties appointed by the multiple parties who have common interest or designated ex officio by the administrative court may be substituted, increased in number, or cancelled by all parties.The administrative court, whenever it considers necessary, may order to substitute, increase in number or cancel the representative parties who were designated by itex officio in accordance with the provision of Paragraph 2 of the preceding Article.In case of substitution, increase in number or cancellation prescribed in the two preceding Paragraphs, any of the representative parties who have been appointed or designated before shall lose their capacity to represent.