1. Every vessel, except small craft and seagoing vessels, shall bear the following identification marks on its hull or on fixed boards or plates:
(a) Its name, which can also be an abbreviation or a number
The name shall be inscribed on both sides of the vessel, except for the pushed barges, it shall also be inscribed in a position visible from astern. If, in a side-by-side formation or pushed convoy, one or more of the inscriptions of the propelling vessel’s name are hidden, the name shall be reproduced on boards so placed as to be clearly visible from the directions from which those inscriptions are hidden. If the vessel has no name, it shall bear either the name (or its usual abbreviation) of the organization to which it belongs followed, where applicable, by a number, or the registration number followed, in order to show the country of the vessel’s home port or place of registry, by the letter or letters assigned to that country in annex 1 to these regulations.
(b) Its home port or place of registry
The name of the home port or place of registry shall be inscribed either on both sides of the vessel or on its stern and shall be followed by the letter or letters indicating the country of that home port or place of registry.
(c) One of the following
(i) Its unique European vessel identification number, which is made up of eight Arabic numerals. The first three digits are used to identify the country and the office where this unique European vessel identification number was assigned. This identification mark is mandatory only for vessels that have been assigned a unique European vessel identification number;
(ii) Its official number, which is made up of seven Arabic numerals, possibly followed by a letter in lower-case type. The first two digits are used to identify the country and the office where this official number was assigned. This identification mark is mandatory only for vessels which were assigned an official number that has not yet been converted into a unique European vessel identification number.
The unique European vessel identification number or the official number shall be displayed under the conditions laid down in subparagraph (a) above.
2. In addition, except for small craft and seagoing vessels,
(a) Every cargo vessel shall have its dead-weight tonnage inscribed on both sides, on the hull or on fixed boards or plates;
(b) Every passenger vessel shall display the maximum permissible number of passengers in a conspicuous position on board.
3. The above-mentioned identification marks shall be inscribed in easily legible and indelible Latin characters, their inscription in oil paint being considered indelible. The height of the characters shall be not less than 20 cm for the name and not less than 15 cm for other marks. The width of the characters and the thickness of strokes shall be in proportion to the height. The characters shall be of a light colour against a dark background or vice versa.
4. As an exception to the preceding paragraphs, seagoing vessels may maintain their identification marks.