Backcourt Violation Help

[CDurham]

Do you guys and girls look at where the player is or where the ball is on a Backcourt Violation. In other words do you always see if the ball has Frontcourt status vs. Backcourt status rather than where the player touches the ball.

Had a bang/bang play on a throw in from the side line near midcourt. Team A is in their front court ball is passed to A1 near the mid court line where she touches it (gains possession) and then she steps over the line into the backcourt. I called a Violation.

I saw that the ball had Frontcourt status on the possession and then she preceded into the backcourt.

Is this the right thing to look at??

Thanks!