Ghost Step, Light Troops, Cha 4" and Mob 6"

A unit entirely with Ghost Step ignores Terrain Features and Open Terrain when moving.
The unit must follow the Unit Spacing rule at the end of its move.
A Health Pool with Ghost Step never fulfils the criteria for which models must take Dangerous Terrain Tests due to Terrain Features (but still needs to take Dangerous Terrain Tests from other sources than Terrain Features, such as when making a Flee Move through an enemy unit).
If the unit ends a move inside Impassable Terrain, backtrack the move to the unit’s last valid position, unless as part of a Flee Move, in which case the standard Flee Moves rules apply.

A unit entirely with Light Troops can perform Reform Move Manoeuvres up to twice its Mobility (instead of the normal half Mobility).
If, while doing a Reform Move Manoeuvre, its centre moves further than its Mobility, the move is considered a March Move for the purpose of rules triggered due to Marching (e.g. Dangerous Terrain Test and, if Undead, being restricted from performing a March Move, etc.).
For the purpose of shooting, this is still a Reform Move. I.e. the unit can shoot if moving further than its Mobility.
Note: this rule has no effect on other Move Manoeuvres, including March Moves.
A unit containing Light Troops is always considered to have zero Proper Ranks; ignore Attachable Models with Light Troops joined to a unit for this purpose, unless the unit consists of only Attachable Models.