5 . The undisputed facts are as follows. The petitioner joined as LD Clerk in the year 1979 and thereafter, appointed as Junior Assistant and joined in the establishment of Odisha State Sales Tax Tribunal, Cuttack in 1983. After clearing the Accounts Examination in 1987 and 1993, the petitioner was promoted to the post of Senior Assistant on a temporary basis on 16th April, 1992 and was confirmed in the said post w.e.f 1st August, 1985. As pleaded on record, the petitioner obtained the Caste Certificate dated 12th January, 1977 and submitted the same at the time of his entry into the Government service with a caste ‘Patratanti’ but thereafter, it was cancelled by the learned District Welfare Officer, Puri and on such cancellation, it was challenged before the learned Collector, Puri, who set it aside and directed a fresh hearing and disposal in accordance with law complying the principles of natural justice, whereafter, a de novo proceeding was commenced, wherein, he filed reply on 25th June, 2001. It is alleged that the learned District Welfare Officer, Puri in flagrant violation of the settled legal position and in a most cavalier manner passed the order of cancellation dated 19th November, 2016, while exercising powers under Rule 8(2) of Odisha Caste Certificate (for Scheduled Castes and Scheduled Tribes) Rules, 1980 (hereinafter referred to as ‘the Rules’) without considering