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That's what they told me at the Belgrano when I wanted to do the same with my Canadian AS355 rating. One would assume that if you had 500 hours, you would have it on an ICAO licence, but I can see that sometimes that would not be the case. The way they worded it, it would have been the same procedure as the Canadians, that is accept it straightaway with no check ride, if you had a recent PPC.
Looks like you have to check what they say as well
phil