During the shooting phase, if a model has no enemies in line of sight, that model may choose to run an additional 3" instead of shooting.
ITEN Rulebook, Page 14, Section 7.3:
Each player may shoot with any or all the figures that he has, and may run any figures that are not shooting and have no enemy in line of sight when they begin their run. A run move is 1D6+Speed inches.
Which is it?