Latest territorial assertion by Beijing requires foreign crews operating in disputed waters to notify Chinese authorities
Interestingly, the US called the move by China ‘provocative and potentially dangerous’ - something of a diplomatic departure for a country that spent the period 2000~2008 blaming President Chen for being ‘provocative’ as per Beijing’s directives.
Another thing to note here is that, like the ADIZ, China knows that it’s claims and its intention to enforce them are in practice currently unenforceable. The purpose then would appear to be to pre-create pseudo-legal grounds for direct action later. China appears bent on challenging what it sees as US hegemony in its backyard but, like the velociraptors in Jurassic Park, it is ‘testing the fence’ to find weaknesses in US response time and capability as part of building a ‘denial of entry’ strategy prior to asserting its presence in the South and East China seas.