Appeal question

[akalsey]

Two questions...

If time has not been called runners may return to touch while you are appealing the first one.

Is there a rule system that allows appeals while time is called?

If the defense appeals that R2 left early...

The only rules I'm familiar with are LL and OBR. In LL if you leave early, there's no appeal. The penalty is that all runners may advance a maximum of one base on the play and no runner may score. What rule systems allow appeals on leaving early?

I really need to get myself a rule differences book if I'm going to do this beyond the LL level.