Where i work it is self manuvering departure.
We call it off blocks once the aircraft starts taxiing. With one airline (because they are the only airline we handle who allow us to do so) we close the doors on time and use delay code 00 (self manuvering departure).
Officially we need to record all delays regardless of how long past the STD, however some captains are more helpful than others, and when you go to agree the delay code with them they say "we'll call it on time."
