Vacancies in clinician positions shall be filled based upon city-wide needs. First consideration for such vacancies shall be given to those clinicians who have expressed a desire to transfer. Experience shall be a consideration. The final decision as to the transfer shall be made by the Office of Diverse Learner Supports and Services, unless the duties of the position are performed at a single attendance center, in which case the final decision as to transfer shall be made by the receiving school principal.