In 2019, the Sekondi-Takoradi Metropolitan Assembly (STMA) in Ghana was the first sub-national government to join CoST as a member, together with partners from the private sector and civil society. The Assembly had earned a strong reputation for transparency, participation and accountability as one of the first subnational Open Government Partnership (OGP) members.

The CoST Sekondi-Takoradi multi-stakeholder group has since used this reputation to draw in eight other assemblies (local government authorities) in the Western Region of Ghana to improve transparency by publishing infrastructure data on a shared information platform. The local secretariat has then used this data to publish assurance reports in December 2019 and February 2021, and subsequently engaged with disability rights campaigners and the media, to help improve social and economic inclusion in the Western Region of Ghana by improving the quality and accessibility of infrastructure.