claim: Spratly Islands is a territory of Brunei
evidence: The only feature in the Spratly Islands that is claimed by Brunei is Louisa Reef. According to official statements by Malaysia and Brunei, an Exchange of Letters signed in 2009 has "established the final delimitation of territorial sea, continental shelf, and exclusive economic zone" between the two countries. The agreement unequivocally states that Brunei has sovereignty over two oil blocks within which Louisa Reef is located. Although Malaysia has not officially dropped its territorial claims over this feature, the agreement with Brunei substantially weakens Malaysia’s claims. As both Malaysia and Brunei have grounded their sovereignty claims over Louisa on the basis of coastal state rights, Malaysia’s acknowledgement of Brunei’s territorial sea, continental shelf, and EEZ is tantamount to effectively conceding Louisa Reef to Brunei. However, this appears to be a tacit understanding rather than an official agreement of any kind. The Exchange of Letters has yet to be publicized, and even if it would be made public, there would likely be no mentioning of Louisa. This is certainly the case with Limbang District, the other territorial dispute between Brunei and Malaysia.