If an unencumbered position is one which, if encumbered, would be subject to the provisions of this Part, the salary of such position shall be increased by the salary increase amounts specified in this Part. If a position is created, and is filled by the appointment of an officer or employee who is subject to the provisions of this Part, the salary otherwise provided for such position shall be increased in the same manner as though such position had been in existence but unencumbered. Notwithstanding the provisions of this Part, the Director of the Budget may reduce the salary of any such position which is or becomes vacant.