Article 4g
1. The sale, supply or transfer of key naval equipment and technology for ship-building, maintenance or refit, to Iran or to Iranian or Iranian-owned enterprises engaged in this sector, by nationals of Member States, or from the territories of Member States, or using vessels or aircraft under the jurisdiction of Member States, shall be prohibited whether or not originating in their territories. The Union shall take the necessary measures in order to determine the relevant items to be covered by this provision. 2. The prohibition in paragraph 1 shall be without prejudice to the supply of key naval equipment and technology to a non-Iranian-owned or controlled vessel that has been forced into an Iranian port or Iranian territorial waters under force majeure . 3. It shall also be prohibited to: (a) provide Iran with technical assistance or training and other services related to items referred to in paragraph 1; (b) provide Iran with financing or financial assistance for any sale, supply or transfer of items referred to in paragraph 1 or for the provision of related technical assistance and training. 4. It shall be prohibited to participate, knowingly or intentionally, in activities the object or effect of which is to circumvent the prohibitions set out in paragraphs 1 and 3.