Does the player need to step over the BC line to be a BC violation?

[craiglaw]

In a game yesterday, the player lost control of the ball, and the ball headed toward the back court. No contact by the defender. P was able to avoid stepping over the back court line, but dribbled the ball once in the BC before bring it back. In other words, only the ball was in the back court.

I've never seen this exact situation before. No call was made. Is that correct?