Madras High Court (Madurai Bench), Dr. A.D. Maria Clete, J. — Writ petition by a retired Headmaster seeking certiorarified mandamus to quash the Chief Educational Officer's proceedings in Na.Ka.No.2475/a1/2015 dated 21.11.2015 rejecting rectification of pay anomaly and re-fixation of pay on par with his junior Tmt.S.Alice Manohara Thangam w.e.f. 04.12.2009 — Held, petition dismissed: (i) Delay and laches — petitioner retired 31.05.2013, impugned order passed 21.11.2015, petition filed only in 2017 with no justification for the near four-year delay; a representation to the 3rd respondent being neither statutory nor prescribed under the rules cannot revive a stale claim (relying on C. Jacob v. Director of Geology and Mining, 2008 (10) SCC 115 and Karnataka Power Corporation Ltd. v. K. Thangappan, 2006 (4) SCC 322); entertaining such claims would disrupt the administration of teachers' salary accounts. (ii) Merits — no case made out: the reasoning in G. Sivakanthan (W.P.No.31415 of 2004, dt.1.11.2021) and K. Saratha (W.P (MD) No.14308 of 2021, dt.7.11.2022) that a senior's pay can be fixed on par with a junior only where both belong to the same cadre with identical scales, and that incentive increments sanctioned in different cadres and scales (petitioner's M.Phil increment of 20.12.1993 in the P.G. Assistant cadre versus the junior's M.Phil increment of 04.12.2009 in the Headmaster post) create no rectifiable anomaly, is more apposite — W.P.(MD)No.23980 of 2017 and WMP.(MD).Nos.20138 & 20139 of 2017 dismissed; no order as to costs.