Maybe I'll just jump in here.
I think there are two processes you're speaking about. One is that in the safety management system itself, we do audits of that process to make sure that's working. We do inspections of the actual other regulated activities of the railway company. We follow up in the SMS process as well that the companies are doing their own supervision role, if you will, in ensuring that their employees follow the rules.
In our additional area of work, we do quality assurance reviews on our own inspectors' work, which I think is what you were getting at, in terms of making sure that our inspectors are properly following the procedures for inspection.