Section 4(a) in The Indian Forest Service (Pay) Rules, 2016
(a)where, in the fixation of pay, the pay of members of the Service drawing pay at two or more stages in pre-revised Pay Band and Grade Pay or scale, as the case may be, get fixed at same Cell in the applicable Level the Pay Matrix, one additional increment shall be given for every two stages bunched and the pay of member of Service drawing higher pay in pre-revised structure shall be fixed at the next vertical Cell in the applicable Level;
