Code of Professional Responsibility and Accountability (CPRA)
Section 5. Authority of lawyer to appear. - A lawyer is presumed to be properly authorized to represent any cause in which he or she appears, and no written power of attorney is required to authorize him or her to appear in court for the client. The court, tribunal, or other government agency may, on its own initiative or on motion of either- party, on just cause, require a lawyer to produce or prove the authority to appear on behalf of the client.