Held, initial appointment of the Appellant was only ad-hoc and for a temporary period and was also not in accordance with the 1990 Rules as he did not appear in the requisite test, which was conducted by Staff Selection Commission, before his appointment so this ad-hoc appointment was only a stop-gap arrangement. As soon as Appellant cleared the examination/proficiency test, he was regularised on the post; therefore, officiation of Appellant's post on ad-hoc basis cannot be taken into account for considering the seniority. Therefore, Appellant's regularisation from the date of initial appointment was impermissible and was rightly denied. Appeal dismissed.