Write to...

From Wikipedia

User with chief-status are able to write in every group members calendar even though the user has set its calendar not viewable.

Each user can set the access to its calendar specific for every goupmember the user is member of, within the profile "calendar-accessright“ in the module "contacts“, area "group members“. The profile is fix connected. Which means with the command "delete“, deletes all entries, the proflie will be empty then.

The one to create an event is its owner.