3] Upon due consideration of submissions made by Mr. Dalvi and perusal of the record, we find that the petitioner was placed under suspension between the period 29 July 1995 and 14 December 1999. Upon conclusion of departmental proceedings, it is the case of the petitioner that such period should be treated as ' on duty '. In this regard, the petitioner made representation to the respondents, which was rejected by detailed order dated 9 October 2006. However, even if some allowance has to be granted to the petitioner in respect of the period during which the petitioner was pursuing the departmental appeal, it must be noted that this appeal was disposed of on the ground of maintainability on 29 December 2010. There is, however, no explanation whatsoever as to what prevented the petitioner from instituting the original application within some reasonable period thereafter. In this case, the petitioner has instituted the original application only on 25 June 2012, i.e., after delay of almost eighteen months. Further, the MAT, in the impugned order has made reference to