18. Underlines that the scale and nature of the challenge of sustaining peace can be met through close strategic and operational partnerships between national governments, the United Nations, and other key stakeholders, including international, regional and sub-regional organizations, international financial institutions, regional and other development banks, civil society organizations, women’s groups, youth organizations and where relevant, the private sector, and encourages the Peacebuilding Commission to consider options for regular exchanges and joint initiatives with key stakeholders to promote sustainable peace, including in the framework of the annual sessions of the Peacebuilding Commission;