Defensive player holds/waves hand directly in dribblers face- legal?

[Nevadaref]

Originally posted by Jurassic Referee
I think that CB play 10.3.8SitA gives you an idea about their thinking.

OK,and legal,to try and divert a player's attention.
Not OK(and unsporting) to obstruct their vision.

JR,
After reading both the rulesbook and the casebook, I'm still unclear if this thinking also applies to a player with the ball.