According to the Canadian Citizenship Act of 1946, also referred to as the “Act of 1947” because of its effective date, Canada did not allow dual citizenship. This was the first citizenship act in Canada to create a new citizenship status separate from being considered British Subjects. With the pride of a nation first enacting the right to become Canadian Citizens, it would stand to reason why they also chose at the time to not allow dual citizenship.
The Citizenship Act, effective February 15, 1977, replaced the 1947 Act with a more equitable statute. For example, British subjects no longer received special treatment and dual citizenship became recognized. There was only one provision for automatic loss of citizenship, limited to persons born in the second or subsequent generation Outside Canada unless they took steps to retain their citizenship by their 28th birthday.