Rule 18 requires that the registry operator must conduct a self-review of its performance on a monthly basis. The review must concentrate on the operation of the rules and the registry operator's compliance, in the previous month, with its obligations under the rules, the terms of the service provider agreements and any performance standards agreed between the registry operator and the industry body. Gas Industry Co is required to publish the reports and the 2019 reports can be viewed by clicking on the links below.