The same message that began under Bush that has been carried into the Obama administration.
Multilaterally.
Just like in the Arctic. Russia, Canada, Denmark, Norway, and the US negotiating within the frame work of the Arctic Council.
Britain, Argentina, and Chile within the OAS.
In the eastern Mediterranean Turkey, Syria, Lebanon, Israel, Egypt, and Cypress.
China says bilaterally based on the fact that China and Japan reached a bilateral agreement a few years ago.
And underlying the multilateral vs bilateral argument is the question of whether or not a pre-negotiated agreement should be submitted to UNCLOS, or should UNCLOS make the determination of each individual nations claims based on the technical data that all the individual nations submit to UNCLOS.