Throw in question...

[footlocker]

Can a player dribble a ball while out of bounds on a throw in? The question is about the thrower. What if the dribble touches inbounds?

Instinct tells me that this is legal so long has he does not leave his spot (on a designated throw in). Once the dribble touches inbounds, it's a violation on the retouch. Please help with the rule or case book here.

Thanks.