Here in Norway a holder of ICAO Type II licence or as it is now a JAR certificate covering airframe and engine and holding a radio licence may taxi any aircraft he is licenced for. This also applies to helicopters which I work with. No taxiing on skids for obvious reasons but groundrun of engines. Helicopters with wheels is of course possible to taxi.
Training is not involving flight crew for fixed wing aircraft and you have to pass a test for the Norwegian CAA.
But in my company we always ground run the helicopters together with a pilot. Not nice if you get ground resonance. Then you have to pick the helicopter up in the air or else you roll over.
And cirrus01, no extra pay for the taxi rating
