Following the United Kingdom European Union membership referendum in 2016, the Bill of Rights was cited by the Supreme Court in the "Miller" case, in which the court ruled that triggering EU exit must first be authorised by an act of Parliament. It was cited again by the Supreme Court in its 2019 ruling that the prorogation of parliament was unlawful. The Court disagreed with the Government's assertion that prorogation could not be questioned under the Bill of Rights 1689 as a "proceeding of Parliament"; it ruled that the opposite assertion, that prorogation was imposed upon and not debatable by Parliament, and could bring protected parliamentary activity under the Bill of Rights to an end unlawfully.