By the judgment impugned dated 29.01.2018, learned Single Bench dismissed the petition for writ preferred by the appellantpetitioner questioning correctness of the seniority determined by respondent no. 6 between the appellant and respondent no. 7. In brief, facts of the case are that the appellant-petitioner entered in service of the respondent-Committee of Management as Subject Expert on 11.10.1999. She was absorbed in service of respondent no. 6 as Lecturer on 26.09.2007. While working as Lecturer, the vacancy of the post of Principal occurred due to retirement of one Smt. Shashibala Agrawal on 31.03.2017. At the first instance, a recommendation was made for appointment of the appellant-petitioner as Principal against the vacancy available by treating her as the Lecturer senior-most, however, recommendation made was subsequently withdrawn with recommendation to promote respondent no. 7 as Principal by treating her as the Lecturer senior-most. Being aggrieved by the decision of the respondents, the appellant-petitioner preferred a petition for writ with submission that in light of the provisions of Section 21-G of the Uttar Pradesh Secondary Education Services Selection Board Act, 1982 (hereinafter referred to as "Act, 1982"), the appellant-petitioner is entitled for taking into consideration the earlier services rendered by her for determination of seniority in the cadre of Lecturer. It is further