is what the International Labour Conference does when it decides, by a majority of two-thirds of the votes cast by the delegates present, to abrogate any Convention which has lost its purpose or no longer makes a useful contribution to attaining the objectives of the Organization. An instrument amending the ILO Constitution to make abrogation possible was adopted by the International Labour Conference in 1997 and will only take effect in accordance with article 36 of the ILO Constitution.