The Instrument of Accession (IoA) was a legal mechanism originally introduced under the Government of India Act 1935. It was designed to enable the ruler of a Princely State to formally accede to the proposed Federation of India. While the federation envisaged in 1935 never materialized, the legal blueprint of the IoA was retained. It was adapted as the primary constitutional instrument for territorial integration during the transfer of power in 1947.
Section 7 of the Indian Independence Act 1947
Under Section 7(1)(b) of the Indian Independence Act 1947, British paramountcy over the 565 Princely States lapsed entirely on August 15, 1947. All treaties, suzerainty rights, and obligations binding the states to the British Crown expired simultaneously. Legally, the Princely States regained their absolute sovereignty, creating a fragmented geopolitical landscape. Section 2 and Section 6 of the same Act provided the statutory authority for the rulers to execute an Instrument of Accession to either the newly created Dominion of India or the Dominion of Pakistan.
The Core Surrendered Subjects
The standard IoA was structured around a limited transfer of power. By signing the document, the ruler surrendered governance and legislative jurisdiction over exactly three critical subjects to the Dominion Parliament:
- Defense: External security, military deployment, and armed forces infrastructure.
- External Affairs: Diplomatic relations, treaties, and international representation.
- Communications: Posts, telegraphs, railways, and major transit airways.
The Sovereignty Safeguard Clause
The Instrument of Accession contained a specific safeguard clause (Clause 5) to incentivize reluctant traditional rulers. This clause explicitly declared that the execution of the IoA did not imply the acceptance of any future Constitution of India, nor did it affect the internal autonomy, dynastic succession, or personal sovereignty of the ruler over matters not specified in the surrendered subjects.
Institutional Machinery and Strategic Execution
The Setup of the States Department
To systematically manage the geopolitical transition, the Government of India established a specialized States Department on June 27, 1947, replacing the colonial Political Department. The political leadership was handled by Sardar Vallabhbhai Patel as Minister-in-Charge, while V.P. Menon served as the Administrative Secretary. This duo executed a time-bound strategy to secure accessions before the formal transfer of power on August 15, 1947.
Complementary Legal Mechanisms: The Standstill Agreement
Alongside the IoA, V.P. Menon drafted the Standstill Agreement. This interim legal contract was designed to prevent administrative collapse on day one of independence. It froze all existing administrative arrangements, customs duties, currency flows, trade transits, and communication networks between the Central Government and the Princely States until permanent constitutional relations could be formalized.
Grouping and Classification of Accessions
The states department divided the integration process into clear chronological waves based on the size and location of the states:
| Integration Model | Operational Details | Historical Examples |
| Early Border Accessions | Small states along the immediate borders that signed well ahead of the deadline due to strategic vulnerabilities. | Bikaner, Patiala, Gwalior, Baroda. |
| Provincial Mergers | Small, fragmented states that signed the IoA and were later integrated directly into adjacent British Indian provinces. | Orissa Hill States into Orissa; Kathiawar states into Bombay. |
| Unions of States (Princely Blocs) | Groups of contiguous states that signed individual IoAs and subsequently merged to form larger constitutional units. | Saurashtra, PEPSU (Patiala and East Punjab States Union), Rajasthan. |
| Centrally Administered Enclaves | Strategically sensitive border states managed directly by the Center as Chief Commissioner’s Provinces. | Himachal Pradesh, Manipur, Tripura. |
Case Studies of Contested Accessions
Jammu and Kashmir
Maharaja Hari Singh initially refused to sign the IoA with either India or Pakistan, aiming to maintain Jammu and Kashmir as an independent frontier state. He signed a Standstill Agreement with Pakistan on August 15, 1947. However, following a covert tribal invasion backed by the Pakistani military (Operation Gulmarg) on October 22, 1947, the Maharaja appealed to India for military aid. India conditioned military intervention on the formal execution of the legal accession. Maharaja Hari Singh signed the standard Instrument of Accession on October 26, 1947, which was formally accepted by Governor-General Lord Mountbatten on October 27, 1947. This act made Jammu and Kashmir an integral part of the Indian Union and provided the legal basis for the airlift of Indian troops to Srinagar.
Junagadh
The Nawab of Junagadh, Muhammad Mahabat Khanji III, executed an Instrument of Accession to Pakistan on August 15, 1947, despite the state having an 82% Hindu population and no land contiguity with Pakistan. India contested the accession, citing a breach of geographic contiguity principles and the internal security of the Kathiawar region. Following popular uprisings led by the provisional government in exile (Arzi Hukumat), the Nawab fled to Karachi. On November 8, 1947, the Dewan of Junagadh, Sir Shah Nawaz Bhutto, formally invited the Government of India to take over the state administration to prevent total collapse. India later reinforced the legal integration by conducting a public plebiscite in February 1948, where 99.95% of voters chose India.
Manipur
The state of Manipur, led by Maharaja Bodhchandra Singh, signed the initial Instrument of Accession prior to August 15, 1947, surrendering defense, communication, and external affairs while retaining internal autonomy. Under intense public pressure, the Maharaja held elections in June 1948, making Manipur a constitutional monarchy and the first part of India to implement universal adult franchise. Citing internal political instability and security threats along the Burmese border, the Government of India pressured the Maharaja during a closed-door meeting in Shillong into signing a comprehensive Merger Agreement on September 21, 1949. This completely dissolved the separate state assembly and integrated Manipur as a centrally administered Part C state on October 15, 1949.
Evolution into Constitutional Finality
The Part A, B, C, and D Classification (1950)
The administrative reality of the Instruments of Accession was embedded into the Constitution of India on January 26, 1950. The territory of the Union was structured into four distinct classes:
- Part A: Former British Indian provinces governed by an elected legislature and a Governor.
- Part B: Large Princely States or integrated Unions of States governed by a Rajpramukh (e.g., Hyderabad, Mysore, Jammu & Kashmir, Rajasthan).
- Part C: Former Chief Commissioner’s Provinces and centrally merged smaller princely states.
- Part D: Centrally administered territories, initially limited to the Andaman and Nicobar Islands.
The States Reorganisation Act 1956
The interim arrangements set up by the individual Instruments of Accession were permanently dismantled by the States Reorganisation Act 1956 and the 7th Constitutional Amendment Act 1956. This legislation abolished the multi-tiered state classifications, phased out the feudal office of the Rajpramukh, and redrew the map of India into uniform States and Union Territories based primarily on linguistic and administrative viability.
Historical Trivia for Prelims
The First and Last Signatories
The State of Baroda, ruled by Maharaja Pratap Singh Gaekwad, was among the earliest major states to announce its intention to join the Indian Union. However, the honor of being the very first ruler to formally sign the Instrument of Accession went to Maharaja Sadul Singh of Bikaner on August 7, 1947. Conversely, the last major state inside India’s geographical borders to finalize integration was Hyderabad, following the completion of Operation Polo in September 1948.
The Blank Sheet Offer of Jinnah
During the high-stakes negotiations in the summer of 1947, Muhammad Ali Jinnah attempted to court the border Rajput states of Jodhpur and Jaisalmer to join Pakistan. Jinnah presented Maharaja Hanwant Singh of Jodhpur with a signed blank sheet of paper, inviting him to write his own terms, including full control over the Karachi port, arms imports, and rail links. Sardar Patel countered by offering Jodhpur direct rail connectivity to Kutch and immediate food grain supplies, stopping a major communal and territorial fracture along the western border.
Constitutional Persistence of the IoA
The legal validity of the Instrument of Accession signed by Maharaja Hari Singh remains the bedrock of India’s sovereign claim over Jammu and Kashmir. Even when Article 370 was abrogated in August 2019, the basic legal validity of the 1947 accession stayed intact, as the state’s own Constituent Assembly had declared in Section 3 of its 1956 Constitution that the State of Jammu and Kashmir is and shall be an integral part of the Union of India.
Last Modified: June 15, 2026