Cataphractii Terminator Command Squad

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.

"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.