• One way to do that is create an additional RDL file for the disclaimer and insert that as a subreport after your 1st and 3rd page, using appropriate pagebreaks; might have to place the subreport in a rectangle.

    Then in the header use an expression to determine if it should be displayed. For example if the header has a single textbox set the visibility property of the textbox like this.

    =iif(Globals!PageNumber mod 2 = 0 ,true,false)