JUDGMENT

Aniruddha Roy, J. - The present writ petition has been filed by the Union of India challenging the impugned order dated July 27, 2015 (for short, the impugned order) passed by the Central Administrative Tribunal, Kolkata Bench (for short, the Tribunal) in OA No. 77 of 2010 (Shri Rajabali Prasad versus Union of India & Ors.) (for short, the said Original Application) whereby the said Original Application was allowed by directing to grant the respondent promotion and the consequential benefits thereof.

2. The respondent was employed in the Income Tax department, on August 26, 1969 as a lower division clerk and was later re- designated as Stenographer Grade-III. He served the Union of India, the employer, for about 39 years. From time to time the respondent was promoted to various posts i.e. Inspector of Income Tax, Income Tax Officer etc. As an Income Tax Officer the respondent rendered his service on various posting and discharged his duties as such, including the Tax Recovery Officer (Judicial) etc. and ultimately promoted as Assistant Commissioner of Income Tax (Group-A) w.e.f. November 7, 2001 vide letter dated September 7, 2001. Till such period the respondent had served