what is the official ruling

[BillyMac]

NFHS 2008-09 POINTS OF EMPHASIS

B. Hand-checking. Defenders are not permitted to have hands on the dribbler or offensive players away from the ball. Hand-checking is not incidental contact; it gives a tremendous advantage to the person using illegal hands/tactics. An offensive player who uses his/her hands or body to push off in order to create a more favorable position has committed a foul. Regardless of where it happens on the floor, when a player:
1) Continuously places a hand on the opposing player – it is a foul.
2) Places both hands on a player – it is a foul.
3) Continuously jabs a hand or forearm on an opponent – it is a foul.

That said, here are some things that I keep in mind regarding this situation:
Ball-Handler / Hand-Checking
Two hands on the ball-handler is a foul. Automatic.
One hand that stays on the dribbler is a foul.
Remember RSBQ. If the dribbler’s Rythym, Speed, Balance, or Quickness are affected, we should have a hand-checking foul.