Tax Treatment Agreement means the Tlicho Tax Treatment Agreement among the Government of Canada, the Government of the Northwest Territories and the Tlicho First Nation, signed on behalf of the Government of Canada on February 6, 2003, on behalf of the Government of the Northwest Territories on February 27, 2003 and on behalf of the Tlicho First Nation on March 3, 2003, including any amendments made to it from time to time. (accord sur le traitement fiscal)