"Fred E. Pate" wrote in message
...

GPS: TSO C129a, Class A1 (en route, terminal, and approach)

Yeah, your guess that he was referring to just the GPS portion is
correct. I've read about this "sole source" stuff in a number of places.
A non-WAAS reciever, as the 430s currently are, cannot be used as
"sole source" for anything except GPS approaches.

No, a 430 does not have accurate enough an altitude datum to be sole means.
Altitude is the first portion of WAAS to turn out to be a bust.