Vanguard
Fast Cavalry automatically have Vanguard.
Free Reform
Unless it charges, Fast Cavalry is allowed to reform twice during its move without losing any Movement; once before they move, and at the end of their move. The unit may do this even if it marches, provided that no model ends up moving a number of inches higher than double its Movement value.
Fire & Flee
A unit of Fast Cavalry armed with missile weapons can choose Fire & Flee as a charge reaction. If it chooses to do so, the unit will first fire upon the target following the rules for Stand & Shoot (this also counts as moving and shooting). After this, the unit makes a flee move. However, it may not use its Swiftstride if it does so.
Feigned Flight
A unit of Fast Cavalry that chooses Flee or Fire & Flee as a charge reaction does not cause Panic from fleeing through friendly units and may re-roll failed rally tests in its next Compulsory Movement Phase (unless it is forced to Flee again from another source). In addition, it is then also free to move during the remaining moves part of the Movement phase. The unit is also free to shoot as normal (but always counts as having moved). Note that if the flee move of the Fast Cavalry does not take them beyond the charge reach of their enemies, the unit suffers casualties as normal.
Fire on the March
Fast Cavalry armed with missile weapons are experts at shooting from horseback and can therefore shoot during a turn in which they marched or reformed (providing their weapon doesn't have Move or Fire). However, the normal -1 To Hit penalty for moving and shooting still applies.
Characters
A character model that joins a unit of Fast Cavalry gains Fast Cavalry as long as they stay with the unit. Characters may only join Fast Cavalry with the same Troop Type as them.
Armour Saves
Units containing one or more models with an unmodified close combat armour save better than 4+ cannot use Fast Cavalry.