This is a wonderful opportunity to renew your wedding vows, and is a great way to celebrate a special anniversary.
This kind of ceremony is also wonderful for couples who have been reunited after a separation, or for one reason or another, believed that their original ceremony was meaningless to them (they may have been too young, had no say in the ceremony or simply cannot remember any of it).
These ceremonies are arranged the same way as a marriage ceremony. It must be made clear however, that this is a renewal of vows and and not a marriage.