Children: U.S. and Canadian children under the age of 16 will be able to present the original or copy of their birth certificates, or other proof of citizenship such as a naturalization certificate or citizenship card.

Groups of U.S. and Canadian children ages 16 through 18, when traveling with a school or religious group, social organization, or sports team, will be able to enter under adult supervision with originals or copies of their birth certificates or other proof of citizenship.

Native Americans: Native Americans will be able to continue presenting tribal documents until June 1, 2009, provided they are affixed with a photo. Customs and Border Protection is working closely with interested Native American tribes toward the development of an enhanced tribal card that complies with WHTI.

Cruise Ship Passengers: U.S. citizens on closed-loop cruises (cruises that begin and end at the same U.S. port) will be able to enter or depart the country with a birth certificate and government-issued photo ID. Please be aware that you may still be required to present a passport to enter the countries your cruise ship is visiting. Check with your cruise line to ensure you have the appropriate documents.

U.S. Lawful Permanent Residents: Document requirements for Lawful Permanent Residents will not change under WHTI. U.S. Lawful Permanent Residents can continue to use their permanent resident card (Form I-551) or other valid evidence of permanent residence status.

Ferries and Small Boats: Passengers on ferries and small boat operators are processed much like travelers entering the U.S. through a land border. They are required to present one of the travel document that complies with WHTI.

Boaters: I-68 Registration Holders: Boaters who have an I-68 form will need to follow the new travel document requirements. A NEXUS card is an alternative to a passport for entry into the U.S., and ensuring that you have either a NEXUS card or a passport will enable you to continue to utilize telephonic clearance procedures currently in place for I-68 holders.

An I-68 form is similar to a vehicle registration, and is not an identity document or a travel document.