Canadian Legal FAQS- Div-mob

My former spouse has custody and has decided to move to another province with our children. Can she do this?
Does a judge make the decision about mobility rights?
What if we didn't sign an agreement or our agreement doesn't deal with mobility rights?
What if we can't reach an agreement about the proposed move?
How does a judge decide about mobility rights?
What factors does the judge consider when deciding if a move is in the best interests of the children?
If the move is good for the parent with custody, why wouldn't the judge let him or her just go?
What happens about mobility rights if the parents have joint custody of the children?