The consumer has to follow the AUTHENTICATION process as defined by the OPAS service. The email of the consumer is required by the OPAS system to send notification in case of the availability of new SO2LH information. The AUTHORIZATION of the consumer corresponds to a registration obtained: by sending an email to the point of contact ( with required information (i.e. name, motivation and IP of the computer used for getting access). The IP number of the consumer is required to authorise access (via HTTPS) to the OPAS database of SO2LH datasets.