S/RES/2225 (2015) national ownership, the development and strengthening of the capacities of national institutions and local civil society networks for advocacy, protection and rehabilitation of children affected by armed conflict as well as national accountability mechanisms with timely, sustained and adequate resources and funding; 13. Urges concerned Member States, when undertaking security sector reforms, to mainstream child protection, such as the inclusion of child protection in military training and standard operating procedures, including on the handover of children to relevant civilian child protection actors, the establishment of child protection units in national security forces, and the strengthening of effective age assessment mechanisms to prevent underage recruitment, while stressing in the latter regard the importance of ensuring universal birth registration, including late birth registration which should remain an exception; 14. Emphasizes the responsibility of all States to put an end to impunity and to investigate and prosecute those responsible for genocide, crimes against humanity, war crimes and other egregious crimes perpetrated against children and highlights in this regard the contribution of the International Criminal Court, in accordance with the principle of complementarity to national criminal jurisdictions as set out in the Rome Statute; 15. Recognizes the role of United Nations peacekeeping operations and political missions in the protection of children, particularly the crucial role of child protection advisers in mainstreaming child protection and leading monitoring, prevention and reporting efforts in missions, and in this regard reiterates its decision to continue the inclusion of specific provisions for the protection of children in the mandates of all relevant United Nations peacekeeping operations and political missions, encourages deployment of child protection advisers to such missions, and calls upon the Secretary-General to ensure that the need for and the number and roles of such advisers are systematically assessed during the preparation and renewal of each United Nations peacekeeping operation and political mission; 16. Calls for the continued implementation by United Nations peacekeeping operations of the Secretary-General’s zero-tolerance policy on sexual exploitation and abuse and to ensure full compliance of their personnel with the United Nations code of conduct, reiterates its request to the Secretar y-General to continue to take all necessary action in this regard and to keep the Security Council informed, and urges troop-contributing countries to continue taking appropriate preventive action, such as mandatory pre-deployment child protection training including on sexual exploitation and abuse, and to ensure full accountability in cases of such conduct involving their personnel; 17. Further urges all United Nations entities, including peacekeeping missions, political missions, peacebuilding offices, United Nations offices, agencies, funds and programmes to give full attention to violations against children in the application of the Human Rights Due Diligence Policy on United Nations Support to non-United Nations Security Forces; 18. Reiterates its requests to the Secretary-General to continue to submit comprehensive annual reports to the Council on the implementation of its resolutions and Presidential statements on children and armed conflict and to ensure that in all his reports on country-specific situations the matter of children and armed conflict is included as specific aspect of the report; 19. 15-10051 Decides to remain actively seized of this matter. 5/5