A/HRC/1/L.10 page 34 acquiescence of the State, followed by a refusal to acknowledge the deprivation of liberty or by concealment of the fate or whereabouts of the disappeared person, which place such a person outside the protection of the law. Article 3 Each State Party shall take appropriate measures to investigate acts defined in article 2 committed by persons or groups of persons acting without the authorization, support or acquiescence of the State and to bring those responsible to justice. Article 4 Each State Party shall take the necessary measures to ensure that enforced disappearance constitutes an offence under its criminal law. Article 5 The widespread or systematic practice of enforced disappearance constitutes a crime against humanity as defined in applicable international law and shall attract the consequences provided for under such applicable international law. Article 6 1. Each State Party shall take the necessary measures to hold criminally responsible at least: (a) Any person who commits, orders, solicits or induces the commission of, attempts to commit, is an accomplice to or participates in an enforced disappearance; (b) A superior who: (i) Knew, or consciously disregarded information which clearly indicated, that subordinates under his or her effective authority and control were committing or about to commit a crime of enforced disappearance; (ii) Exercised effective responsibility for and control over activities which were concerned with the crime of enforced disappearance; and