Brunei–Malaysia border Malaysia-Brunei Leaders’ Consultation held in Bandar Seri Begawan. Both PETRONAS Carigali Brunei Ltd and Shell Deepwater Borneo Ltd have 50:50 equity interests in their respective blocks, where PETRONAS Carigali Brunei is the operator of Block N while Shell Deepwater Brunei operates Block Q. At the same event, PETRONAS signed a Head of Agreement with National Unitisation Secretariat of Brunei Darussalam towards formalising a unitisation arrangement for Malaysia’s Kinabalu West NAG field and Brunei’s Maharajalela North Panel field, with negotiations tasked to a Brunei Darussalam and PETRONAS Unitisation Joint Working Group. The HOA will pave the way for the resolution of
Brunei–Malaysia border at the 100 fathom isobath. In its 1979 territorial waters and continental shelf map, Malaysia claimed the area to be part of its continental shelf and depicted the Brunei-Malaysian border as running up to the 100 fathom isobath. Brunei did not recognise these assertions made by Malaysia. The Exchange of Letters signed on 16 March 2009 by the two countries provided for Malaysia's recognition of Brunei's territorial waters which it had earlier disputed. A joint committee is to determine the final maritime border between the two countries. See below for more on the dispute between the two countries. At its