custodial and non-custodial parent
can a non-custodial parent sign a child out of high school?
Re: custodial and non-custodial parent
I'm not sure what you mean by "non-custodial."
You either have joint legal custody or one of you has sole legal custody. Your authority depends on which you have.
If you have joint legal custody, you are supposed to confer and make decisions jointly.