So in England we recently had a situation where the NT manager was in a relegation series and just before game 3 they called a player from their opponents team, clearly to scout that players skills. The player that was called up is 36 years old and hasn't played for the NT team for multiple seasons, so the player shouldn't be considered for the NT team.
I spoke to a BB staff member who told me there is no rules to stop this. I think there should be a ruling implemented in to the code of conduct regarding NT managers using their ability to call up players for personal gain rather than the good of the NT team.
I understand that it can be argued about any player being called up is for the benefit of the NT team, but in situations like this, especially in the playoffs/relegation time of the season when the games are most important.