Modern Indian History
The Idea of federation was first proposed in

Montague Chelmsford Reforms
Indian Councils Act of 1892
Nehru Report of 1928
Morley Minto Reforms

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Modern Indian History
Har Bilas Sarda was instrumental in the passage of the famous Sarda Act of 1930, which provided for

civil marriages
penalisation of parties to a marriage in which the girl was below 14 or the boy was below 18 years of age
enforcing monogamy
removal of restrictions on intercaste marriages

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