I posted about something similar 3 years ago when I first joined. Even though my attendance hasn't been great the last year or so, I was asked to help my bro in law in first aid this year at the convention.
To make a long story short, the society has printed instructions for attendants to NOT cal 911 for an emergency. They are supposed to call attendants first.
If a heart attack or strock patient died because, the bystander did not call 911 could the society be liable??