The list includes U.S. and foreign passports; U.S. military identification cards; state-issued driver's licenses and identification cards; tribal identification cards, and federally issued permanent resident cards.
Starting Jan. 1, state and local government agencies must require people who apply for benefits such as Medicaid, housing assistance and business and gaming licenses, to provide at least one of the listed documents.
Civil and immigrant rights groups are suing in federal court to block this part of Georgia's new immigration law. They argue it is pre-empted by federal law.

Sam Olens
http://accesswdun.com/article/2011/8/240787