Commission on 31 January 1919. The colony was renamed Tanganyika Territory in January 1920. In September 1920 by the Tanganyika Order in Council, 1920, the initial boundaries of the territory, the Executive Council, and the offices of governor and commander-in-chief were established. The governor legislated by proclamation or ordinance until 1926. Britain and Belgium signed an agreement regarding the border between Tanganyika and Ruanda-Urundi in 1924. The administration of the Territory continued to be carried out under the terms of the mandate until its transfer to the Trusteeship System under the Charter of the United Nations by the Trusteeship Agreement of 13 December 1946. British rule through indigenous authorities Governor Byatt took measures to revive African institutions by encouraging limited local rule. He authorized the formation in 1922 of political clubs such as the Tanganyika Territory African Civil Service Association, which in 1929 became the Tanganyika African Association and later constituted the core of the nationalist movement. Under the Native Authority Ordinances of 1923, limited powers were granted to certain recognized chiefs who could also exercise powers granted by local customary law. Sir Donald Cameron became the governor of Tanganyika in 1925. "His work ... was of great significance in the development of colonial administrative policy, being associated especially with the vigorous attempt to establish a system of 'Indirect Rule' through the traditional indigenous authorities." He was a major critic of Governor Byatt's policies about indirect rule, as evidenced by his Native Administration Memorandum No. 1, Principles of Native Administration and their Application. In 1926, the Legislative Council was established with seven unofficial (including two Indians) and thirteen official members, whose function was to advise and consent to ordinances issued by the governor. In 1945, the first Africans were appointed to the council. The council was reconstituted in 1948 under Governor Edward Twining, with 15 unofficial members (7 Europeans, 4 Africans, and 4 Indians) and 14 official members. Julius Nyerere became one of the unofficial members in 1954. The council was again reconstituted in 1955 with 44 unofficial members (10 Europeans, 10 Africans, 10 Indians, and 14 government representatives) and 17 official members. Governor Cameron in 1929 enacted the Native Courts Ordinance No. 5, which removed those courts from the jurisdiction of the colonial courts and provided for a system of appeals with final resort to the governor himself. Railway development In 1928, the Tabora to Mwanza railway line was