Best perspective: The most complete view available by a player that includes the relative positions of the disc, ground, players, and line markers involved in a play. On an unlined field, this may require sighting from one field marker to another. Best perspective always belongs to a player. However, players may rely on the following sources as a component of best perspective:

Players may seek the perspective of sideline players to clarify the rules and to assist players in making the appropriate call. Players may seek the perspective of coaches to clarify a rule, but not to assist in making the appropriate call.