Following were the main proposals of the Cabinet Mission Plan.

1. There was to be a Union of India, embracing British India and the Indian states. 

2. The Union, that is, the federal centre, should have exclusive control of foreign affairs, defence and communications. 

3. Provinces were to have complete autonomy and were to exercise all powers except those vested in the centre. 

4. The provinces of British India were to form three groups, Group A comprising the Hindu majority provinces of Madras, Bombay, C. P, U. P., Bihar and Orissa, Group B comprising the Muslim majority provinces of Punjab, the North-West Frontier Province, Baluchistan and Sind and Group C consisting of Bengal and Assam. 

5. Each group was to settle its own constitution, the representatives of all of them together with the representatives of the Indian states who would join the Union were to meet in a Constituent Assembly to draft a constitution for the Union. 

6. The entire set-up may, if thought necessary will be revived after ten years or periodically every ten years.