Notwithstanding Sections 19839, 19858.1, 19858.3, 19858.4, 19859, and 19859.3, the Department of Human Resources may provide for vacation, sick leave, annual leave, and bereavement leave benefits, including the lump-sum payment of any amount of accumulated leave, with respect to each state officer and employee who either is excluded from the definition of state employee in subdivision (c) of Section 3513, or is a nonelected officer or employee of the executive branch of government who is not a member of the civil service.