FWA NATCA: Cool to se that someone is still using those old scopes. Ours have not been used in a while, and they recently hauled them away.
Our Approach facility
As for the landing clearence, we cannot give landingclearence to an aircraft unless the preceeding have vacated. (General rule)
For light single engine ac, we can give clearence when preceeding is 1000 meters down the runway (landing or departing) The figure is 1500 meters for other light aircraft.