212. The long-term impact of the commitments made by Governments and the international community, together with local authorities and non-governmental organizations, at Habitat II will depend on the implementation of actions agreed upon at all levels, including the local, national, regional and international levels. National plans of action and/or other relevant national programmes and actions to achieve the goals of adequate shelter for all and sustainable human settlements development will need to be developed or strengthened, where appropriate, and their implementation will need to be monitored and evaluated by Governments in close cooperation with their partners in sustainable development at the national level. Similarly, progress in implementing the Habitat Agenda needs to be assessed with a view to encouraging and enabling all interested parties to improve their performance and to strengthen international cooperation.