Explanation:

These unions federated into industrial union known as Textile Labour Association in 1920. In this year, the First National Trade union organisation (The All India Trade Union Congress (AITUC)) was established. Many of the leaders of this organisation were leaders of the national movement. In 1926, Trade union law came up with the efforts of Mr. N.M. Joshi that became operative from 1927. During 1928, All India Trade Union Federation (AITUF) was formed.