When a unit with this special rule makes a shooting attack, half of the models in each rank other than the front rank (or front two ranks if the unit is on a hill), rounding up, can shoot (in addition to the usual models that shoot from the front rank, or front two ranks if the unit is on a hill). A unit cannot Volley Fire if it has moved for any reason during this turn (including reforming), or when making a Stand & Shoot charge reaction.

Note that models in rear ranks use the line of sight of the model at the front of their file.