As a young lawyer Chelvanayakam was not involved in politics but when the British established the Soulbury Commission to look into constitutional reform in Ceylon he and other Tamil people formed the All Ceylon Tamil Congress (ACTC) to represent Tamil interests. He was elected to Parliament in 1947 to represent Kankesanthurai, a constituency he would represent until his death, except for a period between 1952 and 1956. Chelvanayakam left the ACTC over the party's decision to join the government and in 1949 founded his own party, ITAK, also known as the Federal Party.
As a young lawyer, Chelvanayakam was not involved in politics but when the British established the Soulbury Commission to look into constitutional reform in Ceylon he and other Tamil people formed the All Ceylon Tamil Congress (ACTC) to represent Tamil interests. He was elected to Parliament in 1947 to represent Kankesanthurai, a constituency he would represent until his death, except for a period between 1952 and 1956. Chelvanayakam left the ACTC over the party's decision to join the government and in 1949 founded his own party, ITAK, also known as the Federal Party.