Elizabeth II was political leader of the UK at the time Canada gained full sovereignty.
She has seen major constitutional changes , such as devolution in the United Kingdom , Canadian patriation , and the decolonisation of Africa.
Patriation was the political process that led to full Canadian sovereignty , culminating with the Constitution Act , 1982.
Elizabeth II -LRB- Elizabeth Alexandra Mary ; born 21 April 1926 -RRB- has been Queen of the United Kingdom , Canada , Australia , and New Zealand since 6 February 1952.
