States are required to ensure their nationals exercise vigilance when doing business with any Iranian firm, including IRGC and IRISL, to make sure such business does not contribute to Iran's proliferation. States are called upon to prohibit on their territories new banking relationships with Iran, including the opening of any new branches of Iranian banks, joint ventures and correspondent banking relationships, if there is a suspected link to proliferation. States also should prohibit their own financial institutions from opening branches in Iran if there is a suspected link to proliferation.