Disclaimer: I inspect bikes at Maxton and Bonneville - but not El Mirage.
It adds a good bunch of time to inspect for class conformity during tech inspection, because the inspector will have additional items to consider before approving a vehicle for racing. The inspection sheet would likely be necessarily made appreciably longer and more complex -- maybe to the point that there'd need to be one for the different classes so that all pertinent differences can be spelled out for the inspector.
We get many class questions at Maxton -- more (on a percentage of racers basis) than at Bonneville, and this is perhaps due to the number of newbies that race at Maxton. It's pretty common for us to be asked/to have to tell the new racer what class his bike will be in, then we have to explain our reasoning, and this takes time. There are fewer "novices" at Bonneville, and more of them already know the class they'll be in because they've pre-registered. They still show up -- but not as many of 'em.
So - if we were to adopt a class-conformity-during-tech-inspection protocol at Bonneville -- the short times in inspection that we enjoyed last year might become a one-time-only happening. If we don't inspect for class and then the racer does qualify for a record and gets to impound for certification -- and finds then that he isn't legal for his declared class -- well, yup, he'll have some boo-hoo moments, I agree. But by the same token, if we inspect for all this stuff during tech inspection -- lots of racers will be cranky because they've waited longer than they want to wait for their inspection.
Now -- to EM (and also Maxton) -- the situation is different because of what Dan mentions -- the "points race". We're going through a "controversy" on class conformity and points right now at ECTA -- so I might change my story (about the extra time it'll take in inspection) once the issue is sorted out.
So as an inspector, if presented with the need to check class in tech -- I think I'll vote for additional items on the inspector's checklist so we get it right on the first try, and maybe some Prozac for the racers that are in line and getting ticked-off 'cause the wait is so long.
Okay, boys and girls -- it's your turn to tell me what I've missed/overlooked.