Aboriginal Relations and the City of Edmonton. Treaty No. 6 Recognition Day is planned in partnership by the City of Edmonton, through its Aboriginal Relations Office (ARO) , and the Confederacy of Treaty Six First Nations.Treaty No. 6 Recognition Day is one of a range of initiatives shared between the City and the Confederacy.reaty No. 6 commemorative event and celebration. City Room, City Hall. 9am. Mayor Don Iveson and City councillors, invites Edmontonians and all citizens of Alberta’s Treaty No. 6 territory to join him in hosting Treaty No. 6 First Nations leaders at City Hall in honour of Treaty No. 6 Recognition Day.