In accordance with Article 76(8) of UNCLOS Malaysia has on 12 December 2019 made a partial submission to the Commission on the Limits of the Continental Shelf (CLCS) regarding its continental shelf in the northern part of the South China Sea. According to Malaysia (Ex Summary, paras. 1.2-1.4), this partial submission concerns the remaining portion of the Malaysian continental shelf in the South China Sea not covered by the 2009 Joint Submission by Malaysia and Viet Nam ‘in the southern part of the South China Sea’.
China has submitted a Communication dated 12 December 2019 which requests the CLCS to not consider the Malaysian Submission due to the existence of a land or maritime dispute (Article 5(a) of Annex I of the Rules of Procedure of the CLCS). Malaysia rejects the existence of any dispute (Ex Summary, para. 4.1).
For more information see here, Executive Summary, Note dated 12 December 2019 from the Permanent Mission of Malaysia and the Communication dated 12 December 2019 (China).