3. No privileges, immunities or special exemptions shall be admitted in such trials, without prejudice to the provisions contained in the Vienna Convention on Diplomatic Relations. 4. The persons presumed responsible for such acts shall be guaranteed fair treatment in accordance with the relevant provisions of the Universal Declaration of Human Rights and other relevant international agreements in force at all stages of the investigation and eventual prosecution and trial. Article 17 1. Acts constituting enforced disappearance shall be considered a continuing offence as long as the perpetrators continue to conceal the fate and the whereabouts of persons who have disappeared and these facts remain unclarified. 2. When the remedies provided for in article 2 of the International Covenant on Civil and Political Rights are no longer effective, the statute of limitations relating to acts of enforced disappearance shall be suspended until these remedies are re-established. 3. Statutes of limitations, where they exist, relating to acts of enforced disappearance shall be substantial and commensurate with the extreme seriousness of the offence. Article 18 1. Persons who have or are alleged to have committed offences referred to in article 4, paragraph 1, above, shall not benefit from any special amnesty law or similar measures that might have the effect of exempting them from any criminal proceedings or sanction. 2. In the exercise of the right of pardon, the extreme seriousness of acts of enforced disappearance shall be taken into account. Article 19 The victims of acts of enforced disappearance and their family shall obtain redress and shall have the right to adequate compensation, including the means for as complete a rehabilitation as possible. In the event of the death of the victim as a result of an act of enforced disappearance, their dependents shall also be entitled to compensation. 38