[QUOTE=SaddleFitterVA;6488575]
Not all volunteers know the timing rules I guess.
That would be disruptive. You warm up, with a specific ride time, you have a set routine that works for that horse, and to have that interrupted before the test would not be good for lots of horse/rider combinations.
I bet that had someone mentioned it to the TD, the bit checks would have been after the rides.[/QUOTE]
The shows we hosted at my former barn had a ring steward in the warm up. The same person with the clipboard and ride times checked bits, spurs, and whips as we entered the warm up.
Of course, this was the lower level ring, not the FEI ring. 
I am watching the live feed of the freestyle and there is a TD clearly checking the horses for spur rubs. She runs her hands along the horses’ sides even if the rider has dismounted. Maybe that’s covered under a different rule, but that is what I see happening. She looks at her hand checking, I presume, for any sign of blood.