Artikel 21

1. A Member which has ratified this Convention may denounce it, after the expiration of ten years from the date on which the Convention first comes into force, by an act communicated to the Director-General of the International Labour Office for registration. Such denunciation shall not take effect until one year after the date on which it is registered.
2. Each Member which has ratified this Convention and which does not, within the year following the expiration of the period often years mentioned in the preceding paragraph, exercise the right of denunciation provided for in this Article, will be bound for another period often years and, thereafter, may denounce this Convention at the expiration of each period of ten years under the terms provided for in this Article.
3. After consulting the representative organisations of employers and workers concerned, a Member which has ratified this Convention may, after the expiration of five years from the date on which the Convention first comes into force, by a declaration communicated to the Director-General of the International Labour Office, withdraw its acceptance of the obligations of the Convention in respect of one or more of the Articles of Part II, provided that it maintains its acceptance of these obligations in respect of at least one of these Articles. Such withdrawal shall not take effect until one year after the date on which it was registered.
4. Each Member which has ratified this Convention and which does not, within the year following the expiration of the period of five years mentioned in paragraph 3 of this Article, exercise the right of withdrawal provided for in that paragraph, shall be bound by the Articles of Part II in respect of which it has accepted the obligations of the Convention for another period of five years and, thereafter, may withdraw its acceptance of these obligations at the expiration of each period of five years under the terms provided for in this Article.