British North America Act, 1867: Canada’s Constitution Act

There was no “British America Act.” The British North America Act, 1867 (now called the Constitution Act, 1867 in Canada) was passed by the UK Parliament on 29 March 1867, received royal assent 22 May 1867, and took effect 1 July 1867, uniting Canada, Nova Scotia, and New Brunswick into the Dominion of Canada.