Legislation after the State Owned Enterprises case has followed suit in giving the treaty an increased legal importance. In "New Zealand Maori Council v Attorney General" (1990) the case concerned FM radio frequencies and found that the treaty could be relevant even concerning legislation which did not mention it and that even if references to the treaty were removed from legislation, the treaty may still be legally relevant. Examples include the ownership of the radio spectrum and the protection of the Māori language.