Unless otherwise ordered pursuant to section 243.2, subdivision (c), where corrective action of an unlawful appointment(s) is determined appropriate the Board, Executive Officer, or Department, whichever has decided to take the action, shall notify the affected employee(s) and appointing power of the proposed action at least 15 calendar days prior to the effective date of the proposed action. The notice shall state the reason(s) for the proposed action and notify the employee(s) and the appointing power of their right to respond, either verbally or in writing, within 15 calendar days of the date of the notice. The notice shall specify the amount of reimbursement ordered and inform the Appellant of their right to challenge the amount of reimbursement and/or the Voided Appointment itself pursuant to section 243.6, subdivision (a).