So, you aren't aware of any published Terms of Use for the logo?
Unitl now, there are no general guidelines published (or written).
All users that use the logo have a generic/personal license to use it in non-commercial purpose in the context of running an OC site.
Because the german team gets reorganized at the moment, i cannot give you special usage rights.
Maybe the new team will create that general logo usage guidelines ...
... my suggestion is to think about an own logo, where you have the copyright ... waiting for the new teams decision may take some time ...