CFO2GO advises all American directors and shareholders who are connected to a foreign LLC or joint stock corporation (in the Czech Republic these are the s.r.o. or a.s.) to give us a call at their earliest opportunity to establish whether they or their corporations are subject to the regulation. These initial consultations are at no charge or obligation to you or your corporations.
A more detailed layman's explanation of the form can be found here.
The full text of the IRS bulletin can be found here.