During British rule, the Chittagong Hill Tracts were administratively divided into three circles in 1884, namely the Chakma Circle, the Bohmong Circle, and the Mong Circles, each presided over by a hereditary chief from the Chakma and Marma peoples. The circles were codified into law with the Chittagong Hill Tracts Regulations, 1900, which eased revenue collection and administrative burdens on British authorities by delegating tax collection, land administration management and social arbitration responsibilities to the chieftains. In 1901, the Bohmong Circle extended . This administrative structure remained in place until 1964, when the introduction of local self-government abolished the special status of these circles and brought local administration under the control of the central government.