( a ) Subregional activities for development in Central Africa 73 . During the period under review , the ECA Subregional Office for Central Africa ( SRO-CA ) continued to provide capacity-building support to member States and the RECs on a wide range of development issues with particular focus on infrastructure development , transport , trade policies , rationalization of RECs , promoting macroeconomic policy convergence , free movement of people , use of ICT for development , and post-conflict reconstruction .