Fun With Arm Bars ...

[BillyMac]

10-7-12: The following acts constitute a foul when committed against a ball handler/dribbler. A player becomes a ball handler when he/she receives the ball. This would include a player in a post position.
a. Placing two hands on the player.
b. Placing an extended arm bar on the player.
c. Placing and keeping a hand on the player.
d. Contacting the player more than once with the same hand or alternating hands.

10.7.12 SITUATION A: A1 is dribbling in the frontcourt and B1 (a) places two hands on the dribbler; (b) places an extended arm bar on the dribbler; (c) places and keeps a hand on the dribbler; (d) contacts the dribbler more than once with the same hand or alternating hands. RULING: Illegal in all cases. A personal foul shall be ruled any time this type of contact occurs on a player holding or dribbling the ball. (10-6-12)

2014-15 NFHS Basketball Rules Changes
In an effort to eliminate excessive contact on ball-handlers and dribblers outside of the lane area, the committee added Article 12 to Rule 10-6 on contact. As a result, the following acts will constitute a foul when committed against a ball-handler/dribbler: 1) placing two hands on the player, 2) placing an extended arm bar on the player, 3) placing and keeping a hand on the player and 4) contacting the player more than once with the same hand or alternating hands. Rationale: Rather than continuing to make hand-checking a point of emphasis year after year, simply add a brand new rule that requires a personal foul be called any time this type of contact occurs on a player holding or dribbling the ball outside of the lane area. The NFHS game needs this type of illegal contact on the perimeter ball handlers and dribblers eliminated.

2012-13 Points Of Emphasis
Examples of illegal contact are: Hand checking. Any tactic using hands or arms that allows a player on offense or defense to control the movement of an opposing player.
Examples of hand checking foul.
1. Both hands on an opposing player
2. Jabbing a hand or forearm on an opponent.
3. Continuous contact by a hand or forearm on an opponent

Also, at various times in the past:
Regardless of where it takes place on the court, when a player continuously places a hand on the ball handler/dribbler, it is a foul.
Hand checking is a foul and is not incidental contact.
Defensive players shall not have hand(s) on the offensive player. When a player has a hand on, two hands on or jabs a hand or forearm on an opponent, it is a foul.