ICE Public Service Announcement
If you have more than one person, you do ICE 1, ICE 2; ICE 3, etc. The rationale is that at nearly every accident site or medical emergency, the EMTs find a cell phone with lots of numbers, but they don't know which one to call to notify the person's relatives or friends. If these people were designated by ICE, then the EMT could get to the people who most need to know immediately. They could actually meet them at the hospital.
I am sure no emergency room is going to turn you away with out a relative there, but it would ease the process as well as ease the victim to have a close friend or relative there. In some cases, this could be extremely important if all the medical information was not on the person...allergies, diabetes, gastric bypass, etc. You see the merit of this indication.