A/66/44 Data collection (35) The Committee regrets the absence of comprehensive and disaggregated data on complaints, investigations, prosecutions and convictions in cases of torture and ill-treatment by law enforcement, security, military and prison personnel, and extrajudicial killings, enforced disappearances, trafficking and domestic and sexual violence (arts. 12 and 13). The State party should compile statistical data relevant to the monitoring of the implementation of the Convention at the national level, including data on complaints, investigations, prosecutions and convictions in cases of torture and ill-treatment, extrajudicial killings, enforced disappearances, trafficking and domestic and sexual violence, and on means of redress, including compensation and rehabilitation, provided to the victims. The State party should include such data in its next periodic report. Cooperation with United Nations human rights mechanisms (36) The Committee recommends that the State party strengthen its cooperation with United Nations human rights mechanisms, including by permitting visits of, inter alia, the Special Rapporteur on torture and other cruel, inhuman or degrading treatment or punishment, the Special Rapporteur on the promotion and protection of human rights and fundamental freedoms while countering terrorism, the Special Rapporteur on extrajudicial, summary or arbitrary executions, the Working Group on Arbitrary Detention, and the Special Rapporteur on the situation of human rights defenders. (37) Noting the commitment made by the State party in the context of the universal periodic review (A/HRC/13/17/Add.1, para. 3), the Committee recommends that the State party consider ratifying the Optional Protocol to the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment as soon as possible. (38) The Committee recommends that the State party consider making the declarations envisaged under articles 21 and 22 of the Convention. (39) The Committee invites the State party to ratify the core United Nations human rights treaties 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, the Convention for the Protection of All Persons from Enforced Disappearance and the Optional Protocols to the International Covenant on Civil and Political Rights, the International Covenant on Economic, Social and Cultural Rights, the Convention on the Elimination of All Forms of Discrimination against Women, the Convention on the Rights of the Child, and the Convention on the Rights of Persons with Disabilities. (40) The Committee recommends that the State party consider ratifying the Rome Statute of the International Criminal Court. (41) The State party is encouraged to disseminate widely the report submitted to the Committee and the Committee’s concluding observations, in appropriate languages, through official websites, the media and non-governmental organizations. (42) The Committee requests the State party to provide, within one year, follow-up information in response to the Committee’s recommendations contained in paragraphs 12, 16 and 31 of the present document. (43) The Committee invites the State party to present its next periodic report in accordance with its reporting guidelines and to observe the page limit of 40 pages for the treaty-specific document. The Committee also invites the State party to regularly update its common core document in accordance with the requirements of the harmonized guidelines on reporting under the international human rights treaties (HRI/GEN.2/Rev.6), approved by the Inter-Committee Meeting of human rights treaty bodies, and to observe the page limit GE.11-45568 53