We have added a separate type of document called a Safety Bulletin. Anyone can raise a Safety Report, which goes to safety management staff. Once a report has been read and understood by staff, it can be closed, commented on (etc) in the same was as before. But it can also be published as a safety bulletin. As part of the process, you pick which groups the bulletin applies to. Often it won't apply to associate members or air experience people for example.
When someone logs in next, they will be shown a banner at the top asking them to read the latest bulletin (if there are any they haven't yet read). They must read all the published bulletins in order to book out.
When a report is closed, the associated bulletin is unpublished but importantly is still searchable.
The user interface for students and renters is much cleaner, the system actively monitors which bulletins they have and haven't read.