Article 20 1. States shall prevent and suppress the abduction of children of parents subjected to enforced disappearance and of children born during their mother’s enforced disappearance, and shall devote their efforts to the search for and identification of such children and to the restitution of the children to their families of origin. 2. Considering the need to protect the best interests of children referred to in the preceding paragraph, there shall be an opportunity, in States which recognize a system of adoption, for a review of the adoption of such children and, in particular, for annulment of any adoption which originated in enforced disappearance. Such adoption should, however, continue to be in force if consent is given, at the time of the review, by the child’s closest relatives. 3. The abduction of children of parents subjected to enforced disappearance or of children born during their mother’s enforced disappearance, and the act of altering or suppressing documents attesting to their true identity, shall constitute an extremely serious offence, which shall be punished as such. 4. For these purpose, States shall, where appropriate, conclude bilateral and multilateral agreements. Article 21 The provisions of the present Declaration are without prejudice to the provisions enunciated in the Universal Declaration of Human Rights or in any other international instrument, and shall not be construed as restricting or derogating from any of those provisions. 39