Employers required to use new I-9 form in May 2013. See the form and get more information at

http://www.uscis.gov/portal/site/uscis/menuitem.eb1d4c2a3e5b9ac89243c6a7543f6d1a/?vgnextoid=84c267ee5cb38210VgnVCM100000082ca60aRCRD&vgnextchannel=84c267ee5cb38210VgnVCM100000082ca60aRCRD