S/RES/1882 (2009) planning, programmes and strategies prioritize issues concerning children affected by armed conflict; 16. Calls upon concerned Member States to take decisive and immediate action against persistent perpetrators of violations and abuses committed against children in situations of armed conflict, and further calls upon them to bring to justice those responsible for such violations that are prohibited under applicable international law, including with regard to recruitment and use of children, killing and maiming and rape and other sexual violence, through national justice systems, and where applicable, international justice mechanisms and mixed criminal courts and tribunals, with a view to ending impunity for those committing crimes against children; 17. Requests the Secretary-General to continue to take the necessary measures including, where applicable, to bring the monitoring and reporting mechanism to its full capacity, to allow for prompt advocacy and effective response to all violations and abuses committed against children and to ensure that information collected and communicated by the mechanism is accurate, objective, reliable and verifiable; 18. Requests the Secretary-General to provide administrative and substantive support for the Security Council Working Group on Children and Armed Conflict taking into consideration its current workload and the need to strengthen its capacities and institutional memory; 19. Requests the Secretary-General to submit a report by May 2010 on the implementation of its resolutions and presidential statements on children and armed conflict, including the present resolution, which would include, inter alia: (a) Annexed lists of parties in situations of armed conflict on the agenda of the Security Council or in other situations of concern, in accordance with paragraph 3 of the present resolution; (b) Information on measures undertaken by parties listed in the annexes to end all violations and abuses committed against children in armed conflict; (c) Information of progress made in the implementation of the monitoring and reporting mechanism established in its resolution 1612 (2005); (d) Information on the criteria and procedures used for listing and de-listing parties to armed conflict in the annexes to his periodic reports, bearing in mind the views expressed by all the members of the Working Group during informal briefings to be held before the end of 2009; 20. 09-44214 Decides to remain actively seized of this matter. 5