Models with the Bulky (X) Special Rule take up more space on Transport Models." A Model with the Bulky (X) Special Rule does not use up 1 Point of Transport Capacity when it Embarks on a Model with the Transport Sub-Type. Instead it uses up a number of points of Transport Capacity equal to the value of X attached to eh variant of the Bulky (X) possessed by that Model.
"Models with this Special Rule can make Volley Attacks with other Weapons." The Controlling Player of a Model with this Special Rule treats all Ranged Weapons such a Model has that do not have any variant of the Heavy (X) Special Rule or Ordnance (X) Special Rule as having the Assault Trait.
"A Unit of Models with this Special Rule can control Objectives more easily and scores more Victory Points form controlling an Objective." If a Unit that Controls an Objective includes a majority of Models with the Line (X) Special Rule then, whenever the Controlling Player scores Victory Points for Controlling that Objective, an additional number of Victory Points equal to the value of X are scored. For example a Unit of 10 Models of which the majority have the Line (3) Special Rule, hold an Objective worth 1 Victory Point when the Controlling Player scores Victory Points for that Objective, they would score a total of 4 Victory Points. Furthermore, the value of X is added to the Tactical Strength of the Model that has that Special Rule to determine its ability to Control Objectives (see Core Missions in the Warhammer: The Horus Heresy – Age of Darkness Rulebook).
"Models with this Special Rule cannot Pursue fleeing enemy Units." In Step 4 of the Resolution Sub-Phase, a Player that has won Combat cannot choose for a Unit that includes any Models with this Special Rule to Pursue, and must instead select another eligible option for that Unit.
"The Hatred (X) Special Rule grants bonuses against enemies of a specific Faction, Type or Trait." When Locked in Combat, or Engaged in a Challenge, with any enemy Models that have the Type or Trait that is the value of X, then all Models with this variant of the Hatred (X) Special Rule gain a bonus of +1 to all Wound Tests made in that Combat.