Within the United Nations, the Human Rights Committee and the Special Rapporteur on extrajudicial, summary or arbitrary executions are most heavily engaged in the promotion of the right to life, but many other treaty bodies and special procedures address the right to life in some form. In a number of instances, this is because the relevant treaty specifically provides for the right to life (the case with respect to children, international migrants, and persons with disabilities). In others, it is because the customary right to life is not respected whether as a result of a form of discrimination (whether racial or gender-based) or because it and related rights are implicitly protected by the treaty in question (enforced disappearance).