4.The first issue is as to whether TET is required or not, has been settled by the Hon'ble Supreme Court and the second respondent institution being a Minority Aided Institution, the question of insistence of pass in TET is not necessary. That apart, as of 2013, the first respondent / Writ Petitioner has passed TET. With regard to the second issue, a Secondary Grade Teacher was working in the said school and was appointed when the school was as a Middle School, prior to it being upgraded as a High School. Thus, on upgradation, the post has to be converted as a Graduate Teacher post and such conversion being admitted, should take effect from the date on which the post fell vacant. In the instant case, it would be 03.05.2011. The respondent / Writ Petitioner was appointed on 01.08.2011. Thus, as on the said date, the post was a Graduate Teacher Post. With regard to this aspect, the learned Single Bench, took note of the decision in the case of Corporate Manager, CSI Corporate Schools Vs. The State of Tamil Nadu rep. by its Secretary, Department of School Education and others reported in 2006 (5) CTC 504.