The Employment Eligibility Verification Form I-9 is administered under the U.S. Citizenship and Immigration Services (USCIS) and enforced through Immigration and Customs Enforcement (ICE), both agencies within the Department of Homeland Security. U.S. employers are required to use Form I-9 to document the rights of their new hires to engage in permanent employment in the United States and to verify the identities of their employees. Employees are permitted to show any documentation cited by the Form as acceptable; employers may not dictate which documents an employee chooses to produce, so long as the documents that the employee chooses satisfies the requirements of the Form I-9. The latest revision of the Form I-9, dated February 2, 2009, is the only version of the Form that USCIS accepts as valid. This revision accounts for changes in rules to the acceptable documents. One of the major changes introduced by the revision is in the requirement for employees to only produce unexpired documents to employers for the purposes of the Form. Before the rule change, expired documents, such as expired U.S. Passports, were considered acceptable.