Calder v British Columbia (AG) [1973] SCR 313, [1973] 4 WWR 1 was a decision by the Supreme Court of Canada. It was the first time that Canadian law acknowledged that aboriginal title to land existed prior to the colonization of the continent and was not merely derived from statutory law. In 1969, Frank Arthur Calder and the Nisga'a Nation Tribal Council brought an action against the British Columbia government for a declaration that aboriginal title to certain lands in the province had never been lawfully extinguished.