Explanation:

All the Major political parties had boycotted the Simon Commission (1927). Lord Birkenhead had then challenged the Indian leaders to prepare a draft constitution. This challenge was accepted by the Indian leaders and an All Party Conference was called under the Chairmanship of M.A. Ansari.
The conference then set up a drafting committee with Motilal Nehru as the President. Jawaharlal Nehru was the Secretary to the committee. The committee submitted its report in 1928.
The main points of the Nehru report were as follows: India would be given Dominion status. This means independence within the British Commonwealth. India will be a federation which shall have a bicameral legislature at the Centre and Ministry would be responsible to the legislature. Governor General of India would be the constitutional head of India and will have the same powers as that of British Crown. There will be no separate electorate. The draft report also defined the citizenship and fundamental rights.