California Code, Government Code - GOV § 11516

The agency may order amendment of the accusation or District Statement of Reduction in Force after submission of the case for decision. Each party shall be given notice of the intended amendment and opportunity to show that he or she will be prejudiced thereby unless the case is reopened to permit the introduction of additional evidence on his or her behalf. If such prejudice is shown, the agency shall reopen the case to permit the introduction of additional evidence.