Thanks, useful clarification. However, I'll mention that although that's the one that the US signed it's not necessarily the one India would appeal to, dependi

Thanks, useful clarification. However, I'll mention that although that's the one that the US signed it's not necessarily the one India would appeal to, depending on the exact nature of the complaint (which I think we can't really discern from the article). If the later version of UNLOS had granted that India had the right to refuse navigation of its EEZ to other countries, then it could complain about the US violating a widely accepted standard even if the US didn't sign it. Countries make those complaints all the time (reasonable or not), and as mentioned elsewhere in this thread > the United States has said repeatedly that it views the FON provisions as customary international law. So it's quite notable that even the most recent UNLOS don't grant India this right.