(1) Profits derived by an enterprise of a Contracting State from the operation of ships in international traffic shall be taxable only in that Contracting State.
(2) The provisions of paragraph 1 shall also apply to profits from the participation in a pool, a joint business or an international operating agency.
(3) For the purposes of this Article, interest on funds directly connected with the operation of ships in international traffic shall be regarded as income or profits from the operation of such ships and the provisions of Article 12 shall not apply in relation to such interest.
(4) The term "operation of ships" means business of transportation by sea of passengers, mail, livestock or goods carried on by the owners or lessees or charterers of ships, including the sale of tickets for such transportation. On behalf of other enterprises, the incidental base of ships and any other activity directly connected with such transportation.