have committed an offense have no right to trial and may instead be indefinitely detained in special centers on the orders of a social worker. Thousands of children live on city streets. There are also many child prostitutes, and many children who are trafficked to other countries to perform forced labor. A 2008 report by Pastoral de Movilidad Humana indicated that every month around ten children in southern Bolivia “disappeared and were presumed victims of trafficking.” The Defender of Children and Adolescents, a government agency that is charged with protecting children's rights, has 194 offices around the country. Bolivia is not a signatory of the 1980 Hague Convention on the Civil Aspects of International Child Abduction. The UN Committee on the Rights of the Child, in a 2009 report, called on Bolivia to “take all appropriate measures to ensure that children are treated as subjects of rights.” In particular it asked Bolivian authorities to address “the low and unequal legal minimum ages for contracting marriage,” as well as the physical abuse of children (including abuse by police), the number of children living without parents or guardians, and the manifold failings of the juvenile justice system. The Committee recommended that Bolivia “establish a Children's Ombudsman either separate or as part of the existing office of the Ombudsman (Defensor del Pueblo)” and ensure that such an Ombudsman “conforms to the Paris Principles.” The committee also mentioned a variety of other problems afflicting Bolivian children, such as widespread malnutrition, the plight of children living in prisons with their inmate parents, “children's right to play,” child labor, and child abduction. Human trafficking Economic scarcity has led to human trafficking and Child labor in Bolivia. Children are often trafficked for labor. Prostitution Prostitution is legal in Bolivia, but many Bolivian women are taken against their will to other countries and forced to work in prostitution for little compensation. Disabled persons' rights Discrimination against disabled persons is illegal, but this prohibition is not effectively enforced. The Law on Disabilities requires all public and private buildings to be wheelchair accessible; there is a National Committee for Handicapped Persons that is charged with protecting disabled people's rights. Indigenous rights Indigenous persons, who form a majority of the Bolivian population, have been denied land rights owing to their traditional collective ownership of land under the so-called “ayllu” system. Although Bolivian law technically requires that wrongs against individuals and groups