Section 6(1)(i) in The Orissa Universities (Non-teaching employees) Revised Scales of Pay Rules, 2009
(i)in case of a University employee who is on the date of such publication or, as the case may be, on the date of such order, on leave or deputation or foreign service or active service, the said option shall be exercised in writing so as to reach the said authority within three months of the date of his taking charge of his post and or within three months from the date of publication of these rules to the Administrative Department of Heads of Department or Head of Office;