Section 9.6 Open Enrollment Period - Health and Dental Subdivision 9.61 The University agrees to provide a special one-time thirty (30) calendar day open enrollment and change period for health and dental insurance to be held during the month of September, 1995. An employee exercising a change in enrollment shall not be permitted to modify such election during the succeeding twenty-four months, except as otherwise permitted by the insurance contract for specified changes of status.