According to the Immigration Reform and Control Act of 1986 (IRCA), U.S. employers are required to document that all citizen and non-citizen employees hired after November 6, 1986 are eligible to work in the U.S. and that their identities match the information on their employment authorization documents. The U.S. Citizenship and Immigration Service (USCIS) has revised the list of acceptable documents and has published the new I-9 form.
Below are links to PDFs of a copy of the announcement from the CIS and a copy of the new I-9 form for your reference. Every U.S. employer with four (4) or more employees must comply with the I-9 requirement. The immigration department will be available to assist you regarding questions and/or customized training if needed.