Extra-help employees shall not be entitled to leaves of absence without pay as a matter of right, but only in accordance with the provisions of law and this Memorandum of Understanding. Unless otherwise provided, the granting of a leave of absence without pay also grants to the extra-help employee the right to return to a position in the same classification, or equivalent classification in the same department as he/she held at the time the leave was granted. The granting of any leave of absence without pay shall be based on the presumption that the extra-help employee intends to return to work upon the expiration of the leave.