If you plan on owning or driving a boat in Alabama or Florida, you need to get a Certificate of Number and validation decals to operate legally. Sailboats or rental ships don’t need these certificates from you, but all other motorized water vehicles require these numbers.
Also keep in mind that if you want to operate a boat in either Alabama or Florida, you must be over the age of 12 and have received a boater safety certification. This process requires going through a variety of classes to ensure you are ready to drive a boat safely on your own. These certificates are good for life and don’t need upgrades.