Initially we were in the process of prebooking the seminar in advance ( we had a date lined up with the mayor ), through a friend of the family but when we found that it didnt fit into our available schedule we had the wedding set up through an agent that managed to get us dispensation on the seminar.
We were told we couldn't do it during the 10 day waiting period, as we enquired about that, but no doubt that can vary from one area to another.