Brumby
Major
I think the choice for the FON is the one where there is least room for ambiguity in terms of whether it is a rock or an island to minimise issues. Whether there is an airfield is irrelevant for purposes of FON.Okay, but I think just addressing artificial islands in one lump grouping is still too vague for the issue at hand. So far, it seems most of the back and forth between China and the US is centered around Fiery Cross Reef because it's the first one to have an almost completed runway. FCR is noted as having two rocks above high tide in its natural state which would categorize the feature as a rock and UNCLOS does afford rocks their own territorial sea.
I don't believe that is the case, not from a detailed legal argument that I have seen. In fact the reverse is true that there is a recognition that sovereign airspace lags maritime legal development in international issues. There are attempts to equate I.e. to sync them in terms of a legal framework but I don't believe we are there yet.While not part of UNCLOS, international law corresponds sovereign airspace with the maritime definition of territorial waters. So in this instance, the Chinese are not violating international law.
You should also note that in international law, there is a well known legal principle that should be regarded as part of the consideration and that is the Lotus Principle. It is an old established case law that basically outlines the principle that what is not specifically prohibited is allowed. In the case of UNCLOS, it is very clear the legislative text specifically prohibits the creation of territory seas around artificial structures.