Penalty Administration????

[OKREF]

This answers my question.

casebook

6.7C: Under what circumstances does the ball remain live when a foul occurs just prior to the ball being in flight during a try or tap?

Ruling: the ball would ordinarily become dead at once, but it remains live if the foul is by the defense, and this foul occurs after A1 has started the try or tap for goal and time does not expire before the ball is in flight. The foul by the defense may be either personal or technical and the exception to the rule applies to field goal tries and taps and free throw tries. (4-11; 4-41-1)