Page No.# 3/8 names appeared at Sl. No.2, 5 and 3 respectively in the order dated 26.11.2007 were promoted to the post of Assistant Commissioner (Tax & Excise). The final seniority list of Superintendent (Tax & Excise) was published by order dated 23.12.2009, where the names of the respondent No.5 and the petitioner appeared at Sl. No. 4 and 8 respectively. It may be mentioned that the said list also contained the names of persons already promoted at Sl. No.1, 2, 3 and 5. Thereafter, by way of an Office Memorandum dated 15.10.2010, the Department of Personnel, Administrative Reforms & Training, Govt. of Arunachal Pradesh had introduced Post Based Roster in place of 100 Point Roster. Thereafter, vide notification dated 16.08.2012, issued under Article 16(4) of the Constitution of India, the Govt. of Arunachal Pradesh modified the previous notifications holding the field to provide that 80% of the posts/ services against promotional quota from Group ‘B’ to Group ‘A’ shall be reserved for Arunachal Pradesh Schedule Tribe (APST for short) candidates under the Govt. of Arunachal Pradesh with immediate effect. It is further projected that by an order dated 04.11.2005, published in the State Gazette, 3 (three) numbers of post of AC(TE) was sanctioned and created by the Govt. and later on, by another order dated 25.09.2017, another 6 (six) numbers of post of AC(TE) was sanctioned and created by the Govt. Thus, a total of 12 posts of AC(TE) came to exist in the Department of Tax & Excise, Govt. of Arunachal Pradesh. It is further projected that in supersession of the earlier order dated 26.11.2007, the serial numbers of the said 16 officers were recast by order dated 05.11.2015, and the names of the petitioner and the respondent No.5 now appeared at Sl. No. 7 and 10 respectively.