The Financial Industry Regulatory Authority is the largest independent regulator for all securities firms doing business in the United States.

FORBES: All Phone Calls With Brokers In The UK Now Recorded; Coming Soon To Europe and America

Under the sanctions, 31 companies owned or controlled by the government of Sudan are barred from doing business in the United States and it is a crime for American companies and individuals to willfully do business with them.

NPR: U.S. Stiffens Sanctions on Sudan over Darfur

This grants immunity for actions a foreign government takes when it is acting as a government, but not for actions taken when it is acting as, for example, a commercial enterprise, which might occur when the government in question owns a company doing business in the United States.

CENTERFORSECURITYPOLICY: Sovereign Immunity or cover-up?

The price of doing financial business in the United States has just gone up.

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More Chinese companies are doing sufficient business in the United States so as to make collection of a United States judgment far more likely.

FORBES: Why More U.S. Firms Are Suing Chinese Companies

Swedish firms like Skandia, the Nordic region's biggest insurer, which have been doing much more business in the United States, say they must pay world-class salaries to win the best talent.

ECONOMIST: Those egalitarian Swedes | The

As the frontline regulator of every securities firm doing business with the public in the United States, we at FINRA understand we are going to be subject to scrutiny and criticism by the public and media.

FORBES: Securities Firm Regulator FINRA Responds To Its Critics

The Securities and Exchange Commission, the regulatory body that protects U.S. investors, on May 8 informed Congress that it would increase disclosure conditions for companies listing in the United States and doing business with countries affected by American sanctions.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Far Eastern Economic Review Illuminates the Global Implications Of Strengthened SEC Disclosure Requirements

"I think the rules in the United States are pretty clear about doing business with the Iranians at this point, " he said.

BBC: US rules 'clear' on Iran business

We have a company that I know you're going to be at tomorrow that is actually manufacturing steel still in the United States, and doing a great job at it, growing their business and growing the workforce.

WHITEHOUSE: President Obama Closes Forum on Jobs and Economic Growth