Infernal Guard

Chaos Dwarf and Bull Centaur units are not subject to panic rests caused by friendly units which are destroyed or fail a Break test within 6" of them, unless the unit that is destroyed or broken is itsellf a Chaos Dwarf or Bull Centaur unit. 

Characters with the Contempt rule may not join units other than those who are also subject to this rule as well as any other normal restrictions.

Chaos Dwarfs do not need to take a Leadership test in order to march when enemy uits are within 8".

All Chaos Dwarfs therefore flee and pursue 2D6-1" rather than the usual 2D6", note char this penalty does not apply to their charge distance.