ADS-B Transponders with integrated WAAS GPS

At last, the CAA are about to bring out an Appendix to AC43-14 to allow Avionics Engineers to install ADS-B transponders that have an integrated WAAS GPS.

Also, on that front, I believe they are considering to add to this, Mode S  ADS-B capable transponders, that have an external WAAS GPS source manufactured by the same manufacturer as the transponder. This would have to shown as an option in the manufacturers installation instructions.