Code of Civil Procedure Article 44

The appointed parties may conduct all acts of litigation for the appointing parties, provided however that the appointing parties may restrict the appointed parties?authority to abandon claims, admit claims, voluntarily dismiss the action, or settle the case.The restriction of authority imposed by one of the appointing parties shall have no effect with regard to the other appointing parties.Any restrictions provided in the first paragraph shall be evidenced in writing as prescribed in Article 42 or submitted to the court by subsequent pleadings.