New Requirements for U.S. Citizens
We ask all our American guests to check the new regulations with U.S. Customs for documentation you require to re-enter the States.
As far as we found out, you will need after June 1, 2009 a passport, passport card or WHTI-compliant document.
Children under age 16 will be able to continue crossing land borders using only a U.S. birth certificate or naturalization certificate, after the new law takes effect in June.
Please check www.travel.state.gov/travel and find there New Requirements for U.S. Citizens.