I think this information is wrong. Unless it is different for different countries. I am from Brazil, and I've recently obtained my G1 licence. To use my brazilian experience and go directly to full G licence, they just required that I present a letter of experience from my Consulate. That's the document they keep, not the licence itself. However, the lady at the DriveTest Centre told my that I could not drive with my brazilian licence anymore after I obtained my G1. Now, I have scheduled my full G road test and I can't drive without an experience driver accompanying me anymore until I succeed on the road test.