What changes happened regarding these dates?

[Alaska2Canada]

I’m filling out the request for Canadian Citizenship Certification and am also looking at the passport application.

Two dates ranges are commonly asked about. (1) January 1, 1947, and, (2) February 15, 1977 to April 16, 1982.

I assume this has something to do with changes in immigration law with regard to those time periods.

Does anyone know what changes happened that pertains to:

1. January 1, 1947?

2. February 15, 1977 to April 16, 1982?


Thanks so much.

 

[alphazip]

January 1, 1947: The date the first Canadian Citizenship Act took effect. Before this date there were, officially, no Canadian citizens, just British subjects. Contained a number of provisions under which Canadian citizenship could be lost.
February 15, 1977: The date the 2nd Canadian Citizenship Act took effect. Permitted dual citizenship and allowed women to pass citizenship on to their children. Not retroactive.
April 17, 1982: The date the Constitution Act took effect. The Charter of Rights began to govern citizenship issues. (see: http://www.cbc.ca/news2/background/lostcanadians/pdf/taylordecision.pdf)