[Adam]

Four different levels of elbow contact.
1. Incidental, no foul. (B1 hits A1's geographically stationary elbow with his head).
2. Common foul. (A1 steps into his throw or pivot, hitting B1 in the head. No movement of the elbows beyond what the body is doing).
3. Intentional foul. (Elbows flying, or player chinning up and pivoting in a way that puts other players at risk. I consider this foul when it's an action that could have warranted an elbow violation call).
4. Flagrant. (intentional or reckless elbows).

Deciding which is typically judgment. The NFHS wanted to find a way to codify the judgment, but only managed to increase confusion and widen the area of interpretation.