How the principles of play are applied is influenced by where the ball is on the field. In theory the field is divided into thirds. The third of the field that the ball is in will influence how the principles of attack and defense should be applied. Awareness of the risk/safety factors in each of the thirds of the field is critical for players to make good decisions.

A. Safety – refers to the measures taken (decisions) to insure safety is maintained and no unnecessary chances are taken in attack or defense

B. Risk – refers to the degree of chance (decisions) that an individual or team will take in attack or defense to gain an advantage