Slow and Purposeful "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.
Support Unit (X) "A Unit that contains Models with this Special Rule scores fewer Victory Points for Controlling Objective Markers."
A Unit that includes any Models with the Support Unit (X) Special Rule may only ever score a maximum number of Victory Points equal to the value of X for Controlling an Objective, regardless of the Value of that Objective, or any other Special Rules Models in that Unit might have (such as the Line (X) Special Rule).