[ QUOTE ]
Do you know what the "rules" are?
[/ QUOTE ]Angel Flight (which now includes AirLifeline) is divided up into 7 regional groups, each of which have their own rules about pilot requirements. Some require instrument ratings, some don't.
On the liability standpoint, there is, of course, exposure to the pilot. You are, after all, PIC and responsible for the flight. I'm pretty sure all chapters require the pilots to provide proof of insurance in case of an incident or accident. The patients sign liability waivers but the enforcability of those always depends on state law and the event itself. Fortunately, AFAIK, no one has ever had to test it. AF's safety record is phenomenal.