I know people who were busted at the canadian border for drugs who got their entering-canada privileges back, but it took a lawyer and a lot of time/money. If that's possible, then i think that canada excusing your 1970s pot possession is certainly possible.
If you're not convicted of a crime, why would it show up on your criminal record and bar you from doing something? Isn't that unfair?
QUOTE(peejay @ Mar 26 2008, 05:32 PM)

I read about this some time ago. It seems that the USA and Canada are now sharing criminal databases. That 1970's US marijuana bust or DWI that never barred someone from entering Canada before has turned up to haunt them. In other words, they are being barred from entering Canada and are refused entry at the POE for US arrests and convictions often from many years ago. I also read that the USA may begin sharing criminal databases (if they haven't started already) with countries in Europe which would increase the number of countries US citizens with criminal records can be refused entry into.
In answer to the O/P's question. I read there are waivers that can obtained from the Canadian government to allow entry on past US convictions. I also read that people can check with the Canadian government to see whether they are in the database before planning a trip to Canada. I would contact the Canadian consulate in the US to ask questions or look on their website for more information.
The story I read cited an American guy flying to Canada on vacation with his wife shortly after this was implemented recently. He had traveled to Canada on vacation many times for many years in the past but was turned back recently at the Canadian POE because of a marijuana conviction dating back to the 1970's. Talk about ruined vacation plans!