Court rule :7-10. Joint Representation
No attorney or law firm shall enter an appearance for or represent more than one defendant in a multi-defendant trial or enter a plea for any defendant without first securing the court's permission by motion made in the presence of the defendants who seek joint representation. The motion shall be made as early as practicable in the proceedings in order to avoid delay of the trial. For good cause shown, the court may allow the motion to be brought at any time.