If it was first sold from the 16th June 1998 on, it would come under the Recreational craft directive.. And should comply with certain rules and regulations contained in the RCD.
One of those relates to the Hull Identification Number (HID)
Craft identification - Each craft shall be marked with an identification number including the following information:
country of manufacture,
unique serial number,
year of production,
Builder's plate - Each craft shall carry a permanently affixed plate mounted separately from the boat hull identification number, containing the following information:
boat design category according to section 1,
manufacturer's maximum recommended load excluding weight of the contents of the fixed tanks when full
number of persons recommended by the manufacturer for which the boat was designed to carry when under way.
More information here