Hello Gunilla – this has been proposed once before (about two years ago) as a sub-group initiative, however one of the reasons we did not pursue this is because the documents required for this milestone vary by country, by company policy, by intervention type, and other factors. Beyond that, we could not see an effective way to accurately maintain such a resource over time (as country regulations change).
From time to time, TMF RM members have shared (in this forum and in others) various online resources they use to gather this kind of information.