Vacation Balance Waiver for Leave Cancellation. An employee may accumulate vacation to a maximum of twice his or her annual accrual. Vacation accrual shall cease when an employee reaches the maximum allowance. When an employee must cancel a scheduled and approved vacation at the request of management and is not able to reschedule and use vacation prior to attaining his or her maximum allowance, the appointing authority may allow the employee to exceed the maximum allowance and continue to accrue vacation. This “grace period” shall not exceed 3 months, and not more than 1 such “grace period” shall be granted per 12-month period.