For text of the 389-page proposed regulations: REG-121647-10
Since FATCA's enactment in March 2010, the IRS has issued several rounds of guidance, but today's regulations have been much anticipated by taxpayers affected by the FATCA withholding tax regime and the approaching January 1, 2013 effective date.
REG-121647-10 is scheduled to be published in the Federal Register on Wednesday, February 15, 2012.