Interesting facts about Part 6, 7, 8 and 9 of the Indian Constitution1

At the commencement of the constitution, There were three classes of states and one class of territories, listed in First Schedule of the Constitution.

Part A states, which were the former governors' provinces of British India, were ruled by an elected governor and state legislature. The nine Part A states were Assam, Bihar, Bombay, Madhya Pradesh (formerly Central Provinces and Berar), Madras, Orissa, Punjab (formerly East Punjab), Uttar Pradesh (formerly the United Provinces), and West Bengal.

Part B states, which were former princely states or groups of princely states, governed by a rajpramukh, who was usually the ruler of a constituent state, and an elected legislature. The rajpramukh was appointed by the President of India. The eight Part B states were Hyderabad, Jammu and Kashmir, Madhya Bharat, Mysore, Patiala and East Punjab States Union (PEPSU), Rajasthan, Saurashtra, and Travancore-Cochin.

Part C states included both the former chief commissioners' provinces and some princely states, and each was governed by a chief commissioner appointed by the President of India. The ten Part C states were Ajmer, Bhopal, Bilaspur, Coorg, Delhi, Himachal Pradesh, Cutch, Manipur, Tripura, and Vindhya Pradesh.

The sole Part D territory was the Andaman and Nicobar Islands, which were administered by a lieutenant governor appointed by the central government. Political integration after independence and the Constitution of 1950

Parts VI, VII, VIII and IX of the constitution dealt with Parts A, B, C and D of the First Schedule respectively.

To give effect to the demand of creation of linguistic states, States Reorganisation Act, 1956 was enacted and to make suitable changes in the constitution, Seventh Amendment was made to the constitution.

The States Reorganisation Act was enacted on 31 August 1956. Before it came into effect on 1 November, an important amendment was made to the Constitution of India. Under the Seventh Amendment, the existing distinction among Part A, Part B, Part C, and Part D states was abolished. The distinction between Part A and Part B states was removed, becoming known simply as "states". A new type of entity, the Union Territory, replaced the classification as a Part C or Part D state.

Related changes by other legislation

Thus, Part VII and IX were repealed by the seventh amendment. Part VI dealt with states, and Part VIII dealt with the Union Territories.

1 http://qr.ae/TUNOG1 - Quora Article by Diwakar Kumar Clause 16.-Part VIII of the Constitution provides for the administration of Part C States and Part IX for the administration of Part D territories. It is proposed to amend Part VIII to provide for the administration of Union territories and to repeal Part IX.

Seventh Amendment

Later part IX was inserted to give constitutional recognition to Panchayat Raj institutions by 73rd amendment of the constitution.