now within Canada's complete control to amend; until 1949, the constitution could only be changed by a further act at Westminster. The British North America (No. 2) Act, 1949, granted the Parliament of Canada limited power to amend the constitution in many areas of its own jurisdiction, without involvement of the United Kingdom. The constitution was amended in this manner five times: in 1952, 1965, 1974, and twice in 1975.

Negotiations continued sporadically between federal and provincial governments