All African countries are invited to become a member of CABRI. The membership procedure includes acceding to the International Agreement establishing CABRI.
![Membership Procedure English](https://www.cabri-sbo.org/uploads/imager/www_cabri-sbo_org/uploads/files/Membership-Procedure-English_220401_135054_c91e91ee77e8009313ee809ab792c4e9.jpg)
*The General Assembly reviews membership fees every three years.
Based on the principles of transparency, simplicity and fairness, CABRI implemented a three-tier nominal membership fee structure based on a country’s gross domestic product (GDP). The three categories that best reflect the natural groupings amongst the CABRI members and the membership fees are tabled below.
![Membership Fees English](https://www.cabri-sbo.org/uploads/imager/www_cabri-sbo_org/uploads/files/Membership-Fees-English_220401_135127_c91e91ee77e8009313ee809ab792c4e9.jpg)