The area around modern Pattani, Narathiwat, southernmost Songkhla, Satun, and Yala remained under Thai control, where decades later the South Thailand insurgency would erupt.

Thailand relinquished its claims to sovereignty over Kedah (Thai: ไทรบุรี, romanized: Saiburi), Kelantan (กลันตัน, Kalantan), Perlis (ปะลิส, Palit) and Terengganu (ตรังกานู, Trangkanu) which entered the British sphere of influence as protectorates.

Mongkut constantly made concessions to the British and French to maintain independence in Siam until, in 1868, he was succeeded by Chulalongkorn, who ruled from 1868 to 1910.

He abolished slavery, centralised revenues, created a national educational system, and safeguarded Siamese independence.

The transfer provided for in the preceding article shall take place within thirty days after the ratification of this treaty.

A mixed commission, composed of Siamese and British officials and officers, shall be appointed within six months after the date of ratification of this treaty and shall be charged with the delimitation of the new frontier.

The work of the commission shall be commenced as soon as the season permits, and shall be carried out in accordance with the boundary protocol annexed hereto.

It is understood that in accordance with the usual custom where a change of suzerainty takes place, any concessions within the territories described in article 1 hereof to individuals or companies, granted by or with the approval of the Siamese government, and recognised by them as still in force on the date of the signature of the treaty, will be recognised by the government of his Britannic majesty.

The jurisdiction of the Siamese International Courts, established by article 8 of the treaty of 3 September 1883, shall, under the conditions defined in the jurisdiction protocol annexed hereto, be extended to all British subjects in Siam registered at the British consulates before the date of the present treaty.