Canon Laws on marriage really are not created by dioceses. All of them follow the same Code of Canon Law.
Here is the answer to all... from Catholic Answers,
The question was about canon law and the role of the local ordinary in granting the request....
The local ordinary is the bishop. He must give permission for a Catholic to marry a non-Catholic. The Catholic party must promise to do all in his or her power to raise the children Catholic. The non-Catholic party must be informed of this promise at an appropriate time. The Catholic party also must declare that he or she is prepared to remove and dangers of defecting from the faith. Notice it is the Catholic that is doing the promising. The Church is trying to protect the Catholic faith of the Catholic and any children that may come along.
A dispensation may be granted by the local bishop, on a case by case basis, to allow the marriage celebration to occur in a place other than a Catholic Church.
You should contact your priest who will assit you in getting the necessary permissions and dispensations.
The decision is with the local bishop. As stated above it is a case by case decision. Your local bishop may allow what the next bishop may not...