The Joint Aviation Authorities (JAA) was an associated body of the ECAC representing the civil aviation regulatory authorities of a number of European States who had agreed to co-operate in developing and implementing common safety regulatory standards and procedures. It was not a regulatory body, regulation being achieved through the member authorities.
A number of European States agreed to the formation of the Joint Aviation Authorities.
Athough the Joint Aviation Authorities was formed by ECAC (European Civil Aviation Conference), and not the European States directly.