This document outlines the working structure and guiding principles for collaboration of COVAX, the Vaccines pillar of the Access to COVID-19 Tools Accelerator (ACT-A). The working structure of COVAX continues to adapt to emerging needs and the changing trajectory of the pandemic. Some components of the pandemic response capabilities united under COVAX may eventually be integrated into regional, national and sub national health systems, routine immunization programmes and future global pandemic preparedness and response (PPR) structures. Therefore, the working structures outlined in this document continue to evolve and the document provides a snapshot of the COVAX ways of working in the first half of 2022.