Is it possible to be immune to Decrease Agility?

[Crysillion]

Looking through the item_bonus.txt, the list of Effects doesn't seem to include many things - including the Decrease Agility effect. How could I go about making it so an item makes you immune to some of the effects not listed here, such as Decrease Agility?

[Cydh]

Possible with some custom source, you can read this Status Change Resistance Bonus: bonus2 bResSC and bonus2 bResSC