If a unit contains at least one model with this special rule, and that unit arrives on a random table edge (due to Outflank, or other special rules), then you can re-roll to see which table edge they arrive from.
A unit that contains at least one model with this special rule automatically passes Fear and Regroup tests. When it Regroups, the unit does not make the 3" Regroup move, but can instead move, shoot (or Run) and declare charges normally in that turn. Furthermore, if a unit containing one or more models with this special rule is caught by a Sweeping Advance, they are not destroyed, but remain locked in combat instead.
If a unit contains at least one model with this special rule, and that unit is charged, every model with the Counter-attack special rule in the unit gets +1 Attack until the end of the phase. If, when charged, the unit was already locked in combat, the Counter-attack special rule has no effect.
When a unit that contains at least one model with this special rule shoots, one model in the unit can shoot at a different target to the rest of his unit. Once this shooting attack has been resolved, resolve the shooting attacks made by the rest of the unit. These must be at a different target, which cannot be a unit forced to disembark as a result of the Split Firing unit's initial shooting attack.
