Hello the current area that has been change is currently under Philippine Jurisdiction because of the Philippine outpost or active military vessel in ayungin Shoal. this has been back and forth resupply mission of the Government of the Philippines.

Since 1999 Philippine BRP Sierra madre grounded a military vessel to be an Philippine Outpost in Ayungin Shoal ( Second Thomas Shoal )

Sources:

Document: https://www.pacom.mil/Portals/55/Documents/pdf/J06-Sierra%20Madre%20and%20Second%20Thomas%20Shoal.pdf?ver=pLzHUXFTPSsSWX5ElSc8lA%3D%3D

US Government: https://www.state.gov/u-s-support-for-the-philippines-in-the-south-china-sea-5/

UNCLOS RULLING: https://www.uscc.gov/research/south-china-sea-arbitration-ruling-what-happened-and-whats-next

Some Related Sources: https://en.wikipedia.org/wiki/BRP_Sierra_Madre https://en.wikipedia.org/wiki/Second_Thomas_Shoal https://amti.csis.org/second-thomas-shoal/