Article 18
1. The making of an investment through transactions referred to in Article 17(1) in an Iranian person, entity or body engaged in the manufacture of goods or technology listed in Annex III shall be subject to an authorisation from the competent authority concerned. 2. The competent authorities shall not grant any authorisation for the transactions referred to in paragraph 1, if they have reasonable grounds to determine that the action would contribute to one of the following activities: (a) Iran's enrichment-related, reprocessing or heavy water-related activities; (b) the development of nuclear weapon delivery systems by Iran; or (c) the pursuit by Iran of activities related to other topics about which the IAEA has expressed concerns or has identified as outstanding.