(iv) a cross-country flight of at least 540km (300 nm) in the course of which full-stop landings at two aerodromes different from the aerodromes of departure shall be made
"aerodromes of departure"? By that logic you would have to visit an infinite number of aerodromes as you would always have to land at two different ones from the the ones that you have departed from! I think that should read "the first aerodrome of departure".