The Visa Waiver Program Improvement and Prevention of Terrorist Travel Act, 2015
While respecting the Visa Waiver Program Enhancement Act of 2015, travellers affected by these cases must obtain a visa before travelling to the United States because they are no longer eligible to travel under the Visa Waiver Program (VWP), the people concerned are:
Nationals of VWP countries who have travelled or been present in Iran, Iraq, Libya, Somalia, Sudan, Syria or Yemen as of 1 March 2011 (with limited exceptions for diplomatic or military travel in the service of a VWP country).
Nationals of VWP countries who are also Iranian, Iraqi, Sudanese or Syrian nationals, can apply for a visa using the usual appointment processes at a U.S. embassy or consulate. For those who need a visa for urgent travel to the United States, U.S. embassies and consulates are ready to process applications on an expedited basis.
If a person exempted from the procedure because of their diplomatic or military presence in one of the seven countries is refused their ESTA, they can visit the CBP website or contact the CBP information centre. The traveller may also apply for a non-immigrant visa at a U.S. embassy or consulate.
U.S. Customs and Border Protection strongly recommend that all travellers to the United States verify their ESTA status before making a reservation or travelling to the United States.