participation who own fully vested, fully funded, noncashable individual retirement annuity contracts issued under the terms of an insti t utional retirement plan of a previous employer may begin participation in this retirement plan, through the regular TIAA and/or CREF annuities used under this plan, on the first day of the month following employment at the University. However, any eligible employee who has met the requirements for participation may, with the approval of the University, continue to participate in a retirement plan other than TIAA-CREF, providing, however, plan contributions are made in accordance with Section VI of this plan. IV. Normal Retirement Age: Except as provided in Section V, all participants in this retirement...