Section 5(2)(b) in The U.P. Lokayukta And Up-Lokayuktas Act, 1975
(b)where the office of an Up-Lokayukta becomes vacant or where he is unable to perform the duties of his office, by the Lokayukta himself or if the Lokayukta so directs by the other Up-Lokayukta or, as the case may be, such one of the other Up-Lokayuktas as may be specified in the direction.