Pramath Patnaik, J.

1. In the instant Letters Patent Appeal, the appellants call in question the legality and propriety of the judgment dated 20.08.2013 passed in W.P.(S) No. 2986 of 2010 by learned Single Judge, whereby and whereunder the writ application filed by the respondent-writ petitioner was allowed with a direction to the appellants-State to release the arrears of difference of salary to the respondent-writ petitioner on post of Deputy Director to which he has been promoted with retrospective effect i.e. from 01.07.2001 as also arrears of difference of salary w.e.f. 02.07.2007 on which post he was promoted as Additional Director retrospectively.

2. The factual matrix as delineated and disclosed in the writ petition is that the respondent-writ petitioner initially joined the Department of Mines and Geology in the year 1984. Subsequently, while continuing as such, vide notification dated 1.11.1999, under Annexure 1 to the writ petition, the respondent-writ petitioner in addition to his substantive post was asked to remain in-charge of Deputy Director, Data Bank and Publication Cell, Patna. Accordingly, the respondent-writ petitioner took over the charge of Deputy D