[7] Following Singapore's surrender to the Japanese on 15 February 1942, the Colonial Office started developing a strategy for post-war constitutional and administrative reforms in Malaya and the Borneo territories.

[8] The British Secretary of State for the Colonies submitted a memo on the constitutional policies that should be followed in Malaya and the Borneo territories after they were liberated from the Japanese, and the British War Cabinet appointed a committee from among its members on 6 January 1944, to consider the memo and make recommendations for post-war constitutional and administrative changes.

The new contract was designed to ensure that the Rajah of Sarawak would accept the presence of a resident British adviser, whose counsel must be sought out and considered in all significant areas of policy and administration.

The Secretary of State did not foresee any issues being raised over the transfer of authority to the British Monarch by either the Rajah of Sarawak or the Sultan of Brunei.

Although the Australian BBCAU was disbanded, many of its members volunteered to continue serving until British Borneo's administration was transferred to civil government because of a severe personnel shortage.

Additionally, he was told to take the required actions to set the groundwork for future civil governance by establishing the basic administrative structure inside the freed regions as much as feasible.

Rajah Vyner Brooke officially handed his power to the British Crown on 15 July, leading to the establishment of a new Colonial Administration in Sarawak.

Later about 1,000 Chinese assembled near the Brooke Dockyard near the Main Bazaar in Kuching, preparing to attack mosques and Malay villages there.