A Certificate of Registry is valid for three (3) years. A Certificate of Registry will be issued to the owner or the authorized representative 30 days before it expires. To ensure that your Certificate of Registry remains valid, you must report any change(s) to the information shown on the Certificate of Registry, including a change of address, in writing, within 30 days of having made the changes. If you do not, your registration may be suspended or canceled. Anyone operating a vessel with an invalid document violates the Canada Shipping Act, 2001 and is liable to prosecution.