OK, but they are not enforced here (
AFAIK) , Now, what is done there? Wherever there is?
That's on the fulcrum that teeters with the honor system.
No one comes along with a badge and checks unless audited, or an incident happens.
In fact, here IDK if the FAA audits commercial airlines for AD compliance.
Here in the PP world, the annual should catch the paperwork, But, it can get buried by devious people .