A/RES/56/261 (e) Maintain a database to permit a more comprehensive in-depth analysis of patterns and trends and geographical mapping of the strategies and activities carried out by organized criminal groups, and of best practices to combat transnational organized crime, in consultation with interested States; (f) Maintain a database of relevant national legislation; (g) Support the Ad Hoc Committee on the Elaboration of a Convention against Transnational Organized Crime in the development of rules and procedures for the Conference of the Parties to the Convention; (h) Provide secretariat and general support to the Conference of the Parties to the Convention. II. Action against corruption 5. In order to implement and follow up on the commitments undertaken in paragraph 16 of the Vienna Declaration to develop an effective international legal instrument against corruption and to develop and implement other measures and programmes to prevent and combat corruption, the specific measures below are recommended. A. National actions 6. Individually and collectively, States will endeavour, as appropriate, to support the following actions: (a) Full participation in sessions of the Ad Hoc Committee for the Negotiation of a Convention against Corruption established pursuant to General Assembly resolution 55/61 of 4 December 2000; (b) Promoting the full and effective participation of developing countries, in particular least developed countries, in the deliberations of the Ad Hoc Committee; this may be done through the provision of extrabudgetary resources to the Centre for International Crime Prevention; (c) Making efforts to finalize the future United Nations convention against corruption by the end of 2003, taking into consideration existing legal instruments against corruption and, whenever relevant, the United Nations Convention against Transnational Organized Crime; (d) Commencing, when appropriate, the development of domestic legislative, administrative and other measures to facilitate the ratification and effective implementation of the future United Nations convention against corruption, including both domestic measures against corruption and measures to support effective cooperation with other States. 7. States will endeavour, as appropriate, to address domestic corruption with the following measures: (a) The assessment of domestic types, causes, effects and costs of corruption; (b) The development of national strategies and action plans against corruption, based on the broad participation of stakeholders from Government and civil society; (c) The maintenance or establishment of adequate domestic offences, investigative powers and criminal procedures to deal with corruption and related problems; 4