The Cabinet Mission's purposes were to hold preparatory discussions with elected representatives of British India and the Indian states in order to secure agreement as to the method of framing the constitution, to set up a constitution body and to set up an Executive Council with the support of the main Indian parties.
Promulgated on 16 May 1946, the plan, to create a united dominion of India as a loose Confederation of provinces, came to be known by the date of its announcement:
The plan of 16 june 1946 had a united India, in line with Congress and Muslim League aspirations, but that was where the consensus between the two parties ended since Congress abhorred the idea of having the groupings of Muslim-majority provinces and that of Hindu-majority provinces with the intention of balancing one another at the central legislature. The Muslim League could not accept any changes to this plan since they wanted to keep the safeguards of British Indian laws to prevent absolute rule of Hindus over Muslims.
Reaching an impasse, the British proposed a second plan on 16 June 1946 to arrange for India to be divided into Hindu-majority India and a Muslim-majority India that would later be renamed Pakistan since Congress had vehemently rejected 'parity' at the centre. A list of princely states of India , which would be permitted to accede to the dominion or attain independence, was also drawn up.
The Cabinet Mission arrived in India on 23 March 1946 and in Delhi on 2 April 1946. The announcement of the Plan on 16 May 1946 had been preceded by the Simla Conference in the first week of May.