AIB members are the issuing bodies that have been authorised to administer energy certificate systems for at least one scheme (such as 'electricity'), and for at least one EECS Product (such as guarantees of origin, or an "Independent Criteria Scheme" such as RECS).

This section lists details of members of AIB, together with their approved Domain Protocols (setting out the national or regional implementation of EECS) and their tariffs for account holders. It also provides similar information for similar organisations that AIB has permitted to use the Hub as non-members of AIB.