The Canadian government has proposed amendments to the Citizenship Act which will give Canadian citizenship to a number of people who had lost it due to provisions in existing or former citizenship legislation. Under the current rules, it was possible to lose Canadian citizenship if, for example, you obtained citizenship in another country prior to 1977.

Under the new rules, anyone who was born in Canada or became a Canadian citizen on or after January 1, 1947 and who then lost citizenship will have their Canadian citizenship restored, and anyone born abroad to a Canadian after January 1, 1947 would be recognized as a Canadian citizen from birth, as long as they are the first generation born outside Canada.

http://www.cic.gc.ca/english/department/media/releases/2007/2007-12-10.asp