Answer: Boat Validation Decals
Step-by-step explanation:
After the boat is registered, one gets the wallet-sized certificate and the boats validation decals. The decals are to be displayed on the side of the boat and should be visible to show that the boat is appropriately registered or else there will be legal ramifications.
The validation decal includes such details as: the boat number, the expiry date of the registration and the issuing authority.