From a couple years ago here's the info that I got (AIG):
Aircraft Requirements:
1. IFR certified GPS
2. Moving map display
3. 2 axis autopilot
Plus 2 of the following systems installed on-board and operational:
Terrain awareness such as TAWS, GPWS or EGPWS
Traffic avoidance (TCAS)
Weather monitoring equipment such as stormscope, datalink or radar
Advanced fuel management such as a fuel totalizer
RNP capability
Pilot Requirements:
1. Private or more advanced pilot certificate with instrument rating
2. Completion of an IPC within the previous 12 months and annually thereafter in the make and model aircraft to be operated
3. Attend/complete 1 of 5 ASF courses in the preceding 12 months related to:
a. Single pilot IFR
b. Datalink
c. Thunderstorms
d. IFR GPS
e. Runway Safety
Bob