India-Bangladesh Land Boundary Agreement (2015)

The India-Bangladesh Land Boundary Agreement (LBA) of 2015 is the instrument that operationalised the long-pending settlement of the two countries' 4,096-kilometre land frontier, the longest international boundary India shares with any neighbour. Its legal lineage runs to the Radcliffe Award of 1947, whose hurried Partition demarcation left pockets of territory of one dominion encircled by the other, and to the unresolved princely-state arrangements around Cooch Behar. The first attempt at a comprehensive fix was the Nehru-Noon Agreement of 1958, partially frustrated by litigation that produced the Supreme Court's 1960 advisory opinion in In re Berubari Union, which held that ceding territory required a constitutional amendment rather than mere executive action. The definitive framework was the Indira-Mujib Agreement (Land Boundary Agreement) signed on 16 May 1974, supplemented by a 2011 Protocol negotiated during Prime Minister Manmohan Singh's Dhaka visit. India ratified the package only in 2015 through the 100th Constitutional Amendment Act, which amended the First Schedule to give effect to the territorial transfers.

Procedurally, the settlement addressed three distinct categories of problem. First were the enclaves (chitmahals): 111 Indian enclaves lying inside Bangladesh and 51 Bangladeshi enclaves inside India, totalling roughly 24,000 hectares and an estimated 51,000 stateless residents who for decades lacked access to schools, electricity, policing, and basic administration. Second were the adverse possessions—parcels held and administered by one country but legally belonging to the other—requiring formal regularisation of de facto control. Third was the demarcation of approximately 6.1 kilometres of un-demarcated boundary in three sectors: Daikhata-56 (West Bengal), Muhuri River/Belonia (Tripura), and Lathitila-Dumabari (Assam). The 100th Amendment listed the precise territories to be exchanged or retained, after which survey teams, the joint boundary working groups, and the respective Border Security Force and Border Guard Bangladesh units gave physical effect to the new alignment.

The exchange itself was executed at midnight on 31 July 2015. Residents of the enclaves were given a choice of nationality: they could retain their existing citizenship and relocate to their parent country, or accept the citizenship of the country in which their enclave physically sat. The overwhelming majority elected to stay where they were, accepting new nationality, while a smaller number of residents of former Indian enclaves inside Bangladesh chose to move to India and were resettled in transit camps in Cooch Behar district, West Bengal. On balance India transferred a net larger area of territory to Bangladesh—approximately 10,000 acres net—reflecting the asymmetry of enclave sizes, a feature that drew domestic criticism but was accepted as the price of a final settlement.

The contemporary drivers came together in 2015. The 100th Amendment was passed unanimously by both Houses of the Indian Parliament in May 2015 during Prime Minister Narendra Modi's government, having earlier been introduced under the United Progressive Alliance. Modi's visit to Dhaka on 6–7 June 2015 saw the exchange of instruments of ratification with Prime Minister Sheikh Hasina, alongside the formal handover of strip maps signed by the two foreign secretaries. West Bengal Chief Minister Mamata Banerjee, whose initial objection in 2013 had stalled the 2011 Protocol, ultimately supported the deal and accompanied Modi to Dhaka, underscoring that the boundary settlement required Centre-State concurrence on a matter touching her state's territory.

The LBA must be distinguished from adjacent boundary instruments and concepts. It is not a maritime boundary settlement; the India-Bangladesh sea frontier in the Bay of Bengal was separately resolved by the Permanent Court of Arbitration's award of 7 July 2014 under Annex VII of UNCLOS. Nor is it equivalent to the broader, still-unsettled border-management apparatus that governs the fenced frontier—the LBA fixed where the line runs, whereas issues of fencing within 150 yards of the boundary, cattle smuggling, and irregular migration remain operational challenges handled by the BSF and the Joint Consultative Commission. It is likewise distinct from the Tin Bigha corridor arrangement, an earlier 1992 lease mechanism that gave Bangladesh access to its Dahagram-Angarpota enclave before the LBA dissolved the enclave problem entirely.

Several edge cases and controversies attended the settlement. The decision not to demand reciprocal land-for-land equivalence prompted objections from opposition figures and some strategic commentators who argued India had ceded territory without proportionate gain; proponents countered that the enclaves were administratively ungovernable and that the human cost of statelessness justified finality. The citizenship and resettlement of returnees raised questions about rehabilitation funding and the integration of populations long deprived of documentation. Comparisons were drawn to the Berubari precedent to argue that any future territorial cession by India will similarly require a constitutional amendment, reinforcing parliamentary supremacy over the alteration of national territory under Article 3 and the First Schedule.

For the working practitioner, the LBA is a model case of how a democracy executes a territorial concession: it required a constitutional amendment, bipartisan parliamentary consensus, Centre-State coordination with West Bengal, Assam, Tripura, and Meghalaya, and a humane treatment of affected populations. It removed a chronic irritant from India's most sensitive eastern frontier, deepened the strategic partnership with the Sheikh Hasina government, and demonstrated reciprocity that India invokes in its broader neighbourhood diplomacy. For UPSC and policy candidates the agreement anchors discussions of border management, India-Bangladesh relations, federalism in foreign affairs, and the constitutional mechanics of ceding territory.