Front end event submission
While user-submitted events are often desired, there are of course pitfalls with allowing others to insert events into the public calendar. By enabling event moderation, administrators may review submitted events and approve or reject them, with no undesired events ever reaching the public view.
Enable event moderation on the main configuration settings.
If "Who can approve events" is a higher 'rank' than "Who can submit events", events will wait for approval before being published.
Moderatiing event submissions and event modifications. Cats and cals acl must be respected.