Federalism
18 events, 1833 to 2025; 5 marked as turning points.
1833
Charter Act of 1833 centralises lawmaking
The Government of India Act 1833 removed the Madras government's power to make its own laws and centralised it in Calcutta.
1939
Periyar raises 'Dravida Nadu for Dravidians'
Periyar swapped the slogan 'Tamil Nadu for Tamils' for 'Dravida Nadu for Dravidians', setting the Justice Party on a separatist course.

1950
Madras State established under the Constitution
With the Constitution of India in force, the Madras Province became Madras State, a Part A state of the Indian Republic.

1953
Andhra State carved out of Madras State
The Telugu-speaking northern districts were separated from Madras State to form Andhra State, with Madras city remaining in Madras State.

1956
States Reorganisation redraws Madras State
Malabar and South Canara left Madras State while Kanyakumari district and Shenkottai taluk were added, leaving a Tamil-majority state.

1962
Annadurai demands self-determination in the Rajya Sabha
In his Rajya Sabha speeches, C. N. Annadurai stated the DMK case for the right of self-determination for the Dravidian south.

1963
DMK drops demand for a separate Dravida Nadu
After the Sino-Indian War and the anti-secession Sixteenth Amendment, the DMK abandoned its demand for an independent Dravida Nadu.

1969
Rajamannar Committee on Centre-State relations
The DMK government appointed a committee under P. V. Rajamannar to study state autonomy and Centre-State relations.

1970
State Autonomy Conference held in Madras
Periyar and leaders from other states joined a State Autonomy Conference in Madras called by Chief Minister Karunanidhi.

1974
Assembly adopts state autonomy resolution
Chief Minister Karunanidhi moved a resolution in the Assembly demanding state autonomy, based on the Rajamannar Committee's recommendations.

Chief Ministers win right to hoist flag on Independence Day
Following Karunanidhi's demand, Chief Ministers won the right to hoist the national flag on Independence Day, and he did so at Fort St. George.

1980
MGR government dismissed, President's rule imposed
The Union government dismissed the AIADMK ministry and dissolved the Tamil Nadu assembly, imposing President's rule.
1991
DMK government dismissed under Article 356
The Chandra Shekhar government dismissed the Karunanidhi ministry, citing law and order concerns linked to LTTE activity, and imposed President's rule.
2021
Assembly passes NEET exemption bill
The Assembly passed a bill to admit students to medical courses on Class 12 marks instead of NEET, and re-passed it after the Governor returned it.
2023
Governor R. N. Ravi walks out of the Assembly
Governor R. N. Ravi left the Assembly after it resolved to record only the government-prepared address, which he had departed from.

2025
Dispute over NEP, three-language policy and school funds
Tamil Nadu refused to sign the PM SHRI agreement or adopt the three-language formula, and the Union withheld Samagra Shiksha funds.
Joint Action Committee on fair delimitation meets in Chennai
Chief Ministers and leaders from several states met in Chennai at Stalin's call to oppose delimitation based only on population.
Supreme Court rules against Governor's withholding of bills
The Supreme Court held that Governor R. N. Ravi acted illegally in withholding assent to ten re-passed bills and set timelines for Governors.
