Information from www.tourismvancouver.com
The following information applies to persons entering Canada temporarily as visitors:
US citizens and permanent residents require a birth certificate, a resident alien card or a green card together with picture I.D. or passport to enter Canada. A driver's license is NOT accepted as proof of citizenship.
Persons visiting from countries other than the United States must have a valid passport and may require other documentation such as visas. Check with the nearest Canadian Consulate well in advance of travel.
For information regarding visas and entry requirements for Canada, please call Immigration Canada at 1-888-242-2100 (in Canada) or visit their website at www.cic.gc.ca. From outside Canada, please contact the nearest Canadian Embassy, High Commission, or consulate in your region.
Conference attendees who need a visa to travel to Canada are encouraged to apply for a visa as soon as possible. Those who need invitation letters to get a visa may contact Priscilla Rasmussen at ACL.