One (of many) problems I understand about this proposal is that if you
operate our of an airport that operates aircraft in excess of this
weight, that it will simply be impractical for the FBO there to not
screen everyone as they enter the airport, even if it isn't required
So even if you are going through to your DG400 you may still have be
screened because but they can't practically just wave you around
there screening process becuase you say it doesn't apply to you.

Simply put the proprosal does explain how the will determine who to
screen and who not to.

There are many other problems with this proprosal as well.

Brian