The Director may by his rules provide for transfers of officers and employees in the classified service from positions in one office or department to positions of the same class and grade in another office or department. Transfers which are in the nature of promotions shall be governed by Section 4.10 of this Act.
Subject to the Executive Director's approval, an employee in the classified civil service may make a written request for a voluntary demotion to the employee's most recent former classification, and if granted by the Executive Director, such voluntary demotion shall be final and not subject to review.
70 ILCS 2605/4.12