North Borneo, shall be conducted by Her Majesty's Government, or in accordance with its directions; and if any difference should arise between the Government of Sarawak and that of any other State, the Government of Sarawak agrees to abide by the decision of Her Majesty's Government, and to take all steps necessary to give effect thereto. IV. Her Majesty's Government shall have the right to establish British Consular officers in any part of the State of Sarawak, who shall receive exequaturs in the name of the Government of Sarawak. They shall enjoy whatever privileges are usually granted to the Consular officers, and shall be entitled to hoist the British flag over their residences and public offices. V. British subjects, commerce, and shipping shall enjoy the same right, privileges, and advantages as the subjects, commerce, and shipping of the most favoured nation, as well as any other rights, privileges, and advantages which may be enjoyed by the subjects, commerce and shipping of the State of Sarawak. VI. No cession or other alienation of any part of the territory of the State of Sarawak shall be made by the Rajah or his successors to any foreign State, or the subjects or the citizens thereof, without the consent of Her Majesty's Government; but this restriction shall not apply to ordinary grants or leases of lands or houses to private individuals for purposes of residence, agriculture, commerce, or other business. Economy Population Upon acquisition of his first territories in the First Division, Brooke came into possession of a large quantity of antimony from mines around the area. At the time of his arrival, a land tenure system known as the Native Customary Rights (NCR) had been practised by the indigenous communities. Brooke's first priority was to abolish headhunting among the indigenous communities of the interior. The kingdom's authorities conducted repeated raids on Sea Dayak villages and, facing a major rebellion, ultimately forced them to practice horticulture and abandon headhunting. Land Dayaks had also been involved in headhunting but more readily abandoned the practice and became loyal followers of Brooke. Most Malay coastal villages were also raided as part of the kingdom's policy to combat piracy and slavery. Despite success in these endeavours, stagnant economic conditions persisted and the kingdom amassed huge debts. Brooke promoted Chinese immigration, convinced that they would inject vigour into the economy and prove an encouragement to indigenous communities to participate.