In my insane efforts to be be conisistant,  I try to make it so that a "1" is the best thing to roll for anything.    
   So in order to keep up with this, I changed the way security clearence is done.

You start with a -30 and you add Intellegence and Charisma and level to get your score.   Now when clearence comes into play, you want to roll against your clearence on a d20.  The lower you roll the better.  So just like the main attributes, the higher your clearence score, the better.

Does this make sense?

Ok,

In my campaign, most Supers work for CHESS.  They are assigned a security clearence.  When they need to request information, help,  specific tech, or anything out of the ordinary,  I assign a modifier in my head and have them role against their clearence to get it.
   If its somethine rather mundane, then the modifier is really easy,  or if they want the Plasma Rifle of Doom, then its a huge penalty.


So if their clearence is 7, and the want to access some file, and I mentally decide that its not "top secret" then I can give them a +5 modifer.  Then then need to roll a 12 or lower on a d20 to have access to that file.