Leaving before Tree question

[voltdr]

This is from the 2019 NHRA Rulebook.

SINGLE RUNS
In situations where a driver is making a single run, he or she
is considered the winner once he or she stages and receives
the start signal or is declared the winner by the official starter.
If a competitor crosses the boundary line on a single run, the
elapsed time is voided for lane-choice determination

Dan