Trade Protection, Not Troll Protection?

Yesterday, U.S. Reps. Tony Cárdenas (D-San Fernando Valley, Calif.) and Blake Farenthold (R-Corpus Christi, Texas) introduced the “Trade Protection Not Troll Protection Act.” 

Seriously.  That's what it's called.  

The stated purpose of the Act is to make it harder for "trolls" to bring cases in the International Trade Commission.  Which raises the question:  what the what?

Maybe one of my friends out there with an ITC practice can explain this to me.  I thought to bring an action in the ITC, you had to meet some kind of "domestic industry"  standard.  How does a NPE meet that standard?  And if they do meet the standard, doesn't that mean that they're a "NNPE" (Non-Non-Practicing Entity) or just a "PE" (Practicing Entity)?

I don't get it.