The Belgium government has decided to make changes in the procedure of Belgium Flag registration that are effective from September 1, 2019. The main change is that from this date you can only register a vessel under Belgium flag if you are a citizen, resident or a company in Belgium that is at least 50% owner of the vessel. All existing licenses that are currently valid for 5 years will not be effected by this new law until they are due for renewal. Frequently Asked Questions