Before the colonization, the indigenous Jumma people of CHT were independent. There had been no external interference by any outside power in the affairs of the CHT until 1787, when an agreement was signed with the British. British colonization actually started in 1860. From 1787 to 1860 the British government did not intervene in the internal administration of the CHT. After 1860 and until 1900 the British government administered CHT through a set of Rules promulgated from time to time. For the maintenance of discipline among the police personnel in the CHT, Frontier Police Regulation III of 1881 was promulgated on the 7 December 1881 and CHT Police Force was raised with indigenous Jumma people. For the good government of the CHT, in 1900 the British government enacted the CHT Regulation 1 of 1900 and declared it as an Excluded Area, in order to protect the Jumma people from economic exploitation by non-indigenous Bengali people and to preserve their traditional socio-cultural and political institutions based on customary laws, community ownership of land and so on.