Found this:
- Any penalties signaled during the period of time between the apparent goal and the next stoppage of play shall be assessed in the normal manner, except when a minor penalty is to be assessed to the team scored upon. The scoring of the goal would nullify the penalty. There is an exception made if an infraction happens after the first stoppage of play following an apparent goal (infraction after the whistle) by either team. It is assessed and served regardless as to the decision rendered by the video goal judge.
http://www2.tsn.ca/blogs/kerry_fraser/?id=417111