2.The case of the petitioners herein is that by virtue of the impugned order dated 27.03.2018, the introduction of Upgradation Scheme, challenging the Notification in Rc.No.163720/NGB V(2)/2018, dated 27.03.2018, was issued by the Director General of Police, Chennai, introducing Upgradation Scheme with common date of promotion based on their pre-existing seniority as Grade II P.C. for the post of Head Constable and from Head Constable to Special SubInspector of Police. The grievance of the petitioners is that by introduction of common seniority based on the pre-existing seniority from the date of entry into the service, the persons, who have suffered punishment and held promotion in the normal course will be treated on par with the persons, who have been promoted and in service without any unblemished records. Therefore, the impugned order suffered with infirmity and irregularity and giving advantage to the persons, who had tainted track record in service. Whereas, in the counter filed by the second respondent herein, it is made very clear that while considering the Head Constable to SubInspector of Police for promotion, it is not the seniority alone, but their service records will also be taken into account and the same has been well settled by virtue of G.O.Ms.No.1055, Home (Pol.III) Department, dated 01.11.2006 and therefore, the apprehension expressed by the petitioners is unfounded.