Additionally I am curious if the IUCN actually goes to the French islands to review them. Must be quite an effort.
But what "expert" on the sub Antarctic would forego such a trip???
And the French government would facilitate whatever was necessary. It operates a supply/patrol /research vessel on regular round trips ex Reunion - The "Marion Dufresne"
. Not that difficult to fit in a couple of extra scientists/naturalists? We have been on rather smaller ships originally built for similar purposes (albeit ex Russian) to S Georgia and Antarctic - it is amazing how extra berths can be found!!! It takes 110 passengers anyway and even has a "hospital" (we just had doctor on a freebie!). France seems to be using it to take tourists, presumably to offset its cost, so, at best, only had to lose a few "paying customers" for 28 days - a mere nothing to gain an inscription!! - "In addition to the usual complement of scientists, researchers, technicians and construction workers, in recent years the Marion Dufresne has also played host to an increasing number of tourists (up to 14 per trip) who book passage for a period lasting about 28 days
". - See https://en.wikipedia.org/wiki/Marion_Dufresne_(1995)
Indeed this Twitter post for Nov 28 2018 would seem to show some lucky people engaged in the "Évaluation de la candidature au Patrimoine Mondial de #UNESCO des Terres et mers australes / Visite Station Climat CO2 #IPEV / #TAAF / Amsterdam.
" - On Amsterdam Island near the end of the November sailing. https://twitter.com/hashtag/candidatureUnesco?src=hashPS.
If you REALLY want that tick (assuming it gets inscribed - which it is very likely to) - then it's yours for c 9000 Euros plus flights to/from Reunion ("cheaper" than Wrangel!!) -
"Tourists can book a cabin in the base support ship Marion Dufresne for around 9,000. There are four trips open to tourists per year. The trip leaves from Réunion and takes about 28 days, half of them at sea and half on land. It covers 9,000 km in the Indian Ocean, visiting three or four islands in this order: Crozet, Kerguelen, and Amsterdam before returning to Réunion. If scientists need to go there, the ship stops near Saint Paul but nobody is permitted to set foot on land."
. See - https://en.wikivoyage.org/wiki/Kerguelen