[jeffpea]

In Illinois, the interpretation is to bounce the ball when along the sideline and NEVER along the baseline.

The rational is that you should almost always bounce the ball along the sideline because it allows you to obtain better positioning in case the play moves towards the backcourt (lob entry pass, quick steal, etc.). This is even the case when administering the thow-in at the begining of a period or even after a technical foul.

There is no advantage gained on the baseline; you should be putting the ball in at the nearest spot to the violation or foul. As a result, you should never administer throw-in via the "bounce".