Vacation shall be scheduled to meet the requirements of the Employer on a departmental basis with due consideration given to the Employee's wishes as to time and duration. The actual scheduling of vacations shall be the responsibility of the Program Director or equivalent level of supervision. Such vacations will be scheduled as a regular and routine part of service assignments over the course of the year. Once a vacation request is approved, the Employer shall not unilaterally change or cancel the approved vacation unless the Employer has implemented its Emergency Operations Plan pursuant to UMHS Policy 01-02-000. Either the Employee or the Program Director may initiate a request for a change to previously approved vacation, but any changes must be mutually agreed upon. Vacations are not cumulative and can only be taken during the current vacation period. Nothing herein shall be interpreted to limit vacation entitlement as outlined in this Article.