Unreported Substitute

[rwest]

I think I understand this, just need confirmation.

If an unreported substitute bats and safely makes it on base, if the defense appeals before the next legal/illegal pitch, he/she is removed and disqualified. Can he/she be replace by a substitute? I believe the answer is YES.

If no substitute is available, an out is recorded, correct?

This is different than an illegal player because by rule an illegal player is declared out and disqualified and there can be no substitute.

Have I got this right?

Thanks!