Border Policy Brief
On January 1, 2008, U.S. legislation known as the Western Hemisphere Travel Initiative (WHTI) will become effective at land ports-of-entry on the Canadian border. On that date, all persons entering the U.S. must possess either a passport or another federally-approved form of secure documentation, whereas at present, Canadian and American citizens crossing into the U.S. are able to rely upon documents such as a driver’s license and birth certificate.
1 - January
BPRI, "Western Hemisphere Travel Initiative" (2006). Border Policy Research Institute Publications. 47.