Ours (NJ) go on the license plate, if I had a choice I'd put it under the rear fender.
It depends on your state. When I lived in Houston, I never got my bikes inspected. In 76 I don't think we even had to get them inspected.
Don't put that uuuuuugly thing on your RUNE
Fold it up and keep in under the seat. No cop in his right mind is going to be looking at the inspection sticker. If he's pulling you over, it's just to find out what it is and to tell you how great it looks.
how about on the fork, under the UGLY VIN sticker? (mine is gone, but, I have a buttugly Dept of Defens Base decal on my front fork, so I cant preach. The security folks wont let us put the decal on a plate that can be removed.)