Petitions under Article 226 of the Constitution of India, praying for the issuance of Writs of Mandamus, directing the respondents 1 and 2 to fix petitioners' seniority after the last name of Assistant Medical Officer, Tamil Nadu Medical Services whose services were regularised on or before 24.7.1987, 21.1.1987 and 24.7.1987 taking 24.7.1987, 21.1.1987 and 24.7.1987 respectively as crucial date following the judgement passed in WP(MD) No.3908 of 2009 dated 23.9.2014 by the Madurai Bench of Madras High Court and also give notional promotion (time bound) to the post of Medical Officer based on G.O.Ms.No.51, Health and Family Welfare (IM2-1) Department dated 25.3.2013 and Letter No.29372/1M2-1/2013-13, dated 8.10.2015 by Secretary to Government, Health and Family Welfare (1M2-1) Department to the Principal Secretary/Commissioner of Indian Medicine and Homeopathy with monetary benefit from 1.4.2013 and pay all terminal benefits.