(b) Statistics on gender-based violence and abuse against women and children in custody that have been investigated and prosecuted, and the related convictions of perpetrators and compensations provided to victims; and (c) detainees. Statistics on cases of extradition, expulsion or return, including information on the handing over of (28) The Committee invites the State party to ratify the United Nations human rights treaties and their Protocols to which it is not yet a party, namely the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families, International Convention on the protection of All persons from Enforced Disappearance and the Convention on the Rights of Persons with Disabilities and its Optional Protocol, the Second Optional Protocol to the International Covenant on Civil and Political Rights, the Optional Protocol to the Convention on the Elimination of All Forms of Discrimination against Women, the Optional Protocol to the Convention on the Rights of the Child on the Involvement of children in armed conflict and the optional Protocol to the Convention on the Rights of the Child on the Sale of Children, Child Prostitution and Child pornography. (29) The State party is encouraged to disseminate widely the State party reports submitted by Zambia to the Committee and the Concluding observations and summary records, in appropriate languages, through official websites, the media and non-governmental organizations. (30) The Committee invites the State party to update its core document in accordance with the harmonized guidelines on reporting, approved recently by the international human rights treaty monitoring bodies (HRI/GEN/2/Rev.4). (31) The Committee requests the State party to provide, within one year, information on its response to the Committee’s recommendations contained in paragraphs 10, 11, 13, 15 and 20 above. (32) The Committee requests the State party to submit its next periodic report, which will be considered as its third periodic report, by 30 June 2012. 90