There are only 2 reasons your
BOV should concern the pit inspector:
1. Noise
2. Pollution (MAP/ backfiring etc)
The fact that you have a plumb back valve should cover the pollution problem as you are still satisfying the vacuum through the MAP sensor etc. (eg- no backfiring due to
ECU adding extra fuel etc).
As far as noise, have readings been taken with a decibel meter from a reasonable distance (ie- not in front of the valve!)? Do these exceed the acceptabel limit?? Unless you have some killer pod/ air box setup that flows so effectively even plumb back sound limits exceed that of vented to air etc, I would ask them to review it and claim that you chose aftermarket because the factory valve shat itself etc.
On the GFB website there is a PDF somewhere of their
BOV's passing the eastern states pits now, so I can't imagine why WA would be so anal??!