The US Customs and Border Protection (CBP) issued a notice stating that, commencing January 12, 2009, all nonimmigrant aliens traveling to the United States under the Visa Waiver Program (VWP) must obtain an approved travel authorization from the Department of Homeland Security (DHS) Electronic System for Travel Authorization (ESTA). To comply with ESTA, VWP travelers must provide electronically to CBP the information currently collected on the I-94W Nonimmigrant Alien Arrival/Departure (Form I-94W) through the CBP ESTA website and receive authorization to travel before embarking on travel to the United States. 73 Fed. Reg. 67353 (November 13, 2008).
(Source: Holland & Knight)