[Rich Ives]

The word "appeal" appears several times in the rules, not just in 2.00, 6.07 and 7.10.

You can appeal a check swing.

You can appeal a rules misinterpretation.

So what would you call this:

You go to the umpire and say "F9 has an illegal glove"

You go to the umpire and say "#10 is an illegal player/substitute"

Appeal seems like a good enough word.