“…Many collaborative relationships can be observed between regional tax organisations and actors such as bilateral donor countries, the OECD, UN, IMF, African Union, European Union, multilateral development banks and new global networked organisations such as the Addis Tax Initiative (ATI) and the Platform for Collaboration on Tax (PCT). Together they respond to a growing demand from predominantly developing countries for tax capacity building and technical assistance, in the background of an increased international interest in domestic resource mobilisation (Lips and Lesage, 2021). The degree of activity and growth reflect member states' satisfaction with the services and networking opportunities the regional tax organisations provide.…”