We thus enjoin AUC and ECA to ensure that the APRM plays a leading and significant role in the evolving African governance architecture , and we encourage member States that have not acceded to do so ; Encouraging ongoing United Nations system support to the AUC and its New Partnership for Africa 's Development in the context of the Regional Coordination Mechanism for Africa ( RCM-Africa ) and the subregional coordination mechanisms to strengthen AU/United Nations cooperation at the regional and subregional levels .