Section 3(3) in The University Grants Commission (Disqualification, Retirement and Conditions of Service of Members) Rules, 1956
(3)If all the three persons so selected have been appointed entirely under one of the said clauses, one out of them who shall not retire on such expiration shall again be selected by lot, and in such a case one out of the three persons appointed under the other of the said clauses shall be selected for retirement on such expiration by lot.
