Several days ago, I stated that the Verkehrverbund-Rhein-Mosel Minigruppenkarte did not have the 9 AM start limit. That was a mistake. While the single person VRM Tageskarte (day ticket), like the Tageskarten in RMV (Frankfurt) and MVV (Munich), does not have the start limit, for some reason, VRM, unlike RMV and MVV, puts the limit on the multi-person day ticket.
The VRM website is at www.vrm-info.de and has an option to display in English.