Each department is responsible for scheduling vacations in order not to interfere with the operation of the department and to insure that each Security staff member receives the appropriate vacation allowance during the appointment period. Supervisors must respond to an employee's request to use vacation leave in a timely manner and consistent with department procedures. If an employee's request to use vacation leave cannot be approved, the supervisor must work with the employee to approve vacation leave at the earliest date convenient to the employee and consistent with departmental needs.