Section 4(1)(c) in U.P. Board of Secondary Sanskrit Education (Appointment and Conditions of Service of Heads of Institution, Teachers and other employees of the Institutions Rules, 2009
(c)Where two or more teachers working in a grade are promoted to the next higher grade on the same date, their seniority inter se shall be determined on the basis of the length of their service to be reckoned on the date of their substantive appointment in the grade from which they are promoted: