Canadian Aboriginal law provides certain constitutionally recognized rights to land and traditional practices for Indigenous groups in Canada. Various treaties and case laws were established to mediate relations between Europeans and many Indigenous peoples. Most notably, a series of eleven treaties known as the Numbered Treaties were signed between the Indigenous peoples and the reigning monarch of Canada between 1871 and 1921. These treaties are agreements between the Canadian Crown-in-Council with the duty to consult and accommodate. The role of Aboriginal law and the rights they support were reaffirmed by section 35 of the ''Constitution Act, 1982''. These rights may include provision of services, such as health care through the Indian Health Transfer Policy, and exemption from taxation.