Border Management: Agencies and Laws Governing the India–Nepal Frontier

India and Nepal share an open international border spanning 1,751 kilometers across five Indian states. Governed fundamentally by historical bilateral treaties and modern administrative protocols, the frontier allows unregulated movement of citizens from both nations without visas or passports. Dedicated central armed police forces, customs formations, and bilateral security mechanisms manage trade corridors, cross-border crime, and border demarcation.

Historical Treaties and Legal Framework

Treaty of Sagauli (1816)

• The Treaty of Sagauli, signed on December 2, 1815, and ratified on March 4, 1816, ended the Anglo-Nepalese War between the British East India Company and the Kingdom of Nepal.
• The treaty established the boundary alignment between India and Nepal, fixing the Kali (Mahakali) River as the western boundary and the Mechi River as the eastern boundary.
• Nepal ceded territories west of the Kali River (Kumaon and Garhwal), parts of the Terai plains, and regions between the Mechi and Teesta rivers (Sikkim).

India-Nepal Treaty of Peace and Friendship (1950)

• Signed in Kathmandu on July 31, 1950, by Prime Minister Mohan Shumsher Jang Bahadur Rana of Nepal and Indian Ambassador Chandreshwar Prasad Narayan Singh.
• Article 6 provides that each government shall grant national treatment to the citizens of the other with respect to participation in industrial and economic development.
• Article 7 grants reciprocal rights to citizens of both countries regarding residence, ownership of property, participation in trade and commerce, and free movement across the border without travel visas.

Bilateral Boundary Mechanisms

• The Joint Technical Level Boundary Committee worked from 1981 to 2007 to identify border pillars and prepare strip maps covering roughly 98 percent of the boundary.
• The Boundary Working Group (BWG), established in 2014, oversees the construction, restoration, and maintenance of border pillars and clears encroachments in the “No Man’s Land” (ten-yard border strip).

State-Wise Border Profile and Border Infrastructure

Bordering Indian States

Integrated Check Posts (ICPs) and Trade Corridors

• The Land Ports Authority of India (LPAI) develops and manages Integrated Check Posts along the India–Nepal border to streamline trade, customs clearance, and passenger transit.
• ICP Raxaul (Bihar) – Birgunj (Nepal): Handles the largest share of bilateral trade and cargo transit between the two nations.
• ICP Jogbani (Bihar) – Biratnagar (Nepal): Serves eastern Nepal and industrial zones in Morang district.
• ICP Rupaidiha (Uttar Pradesh) – Nepalgunj (Nepal): Connects western Nepal with Indian supply chains.
• ICP Banbasa (Uttarakhand) – Kanchanpur (Nepal): Facilitates transit in the far-western sector of Nepal.
• Cross-border rail connectivity operates on the Jaynagar (Bihar) to Kurtha (Nepal) broad-gauge railway route.

Security Agencies and Border Governance

Sashastra Seema Bal (SSB)

• The Sashastra Seema Bal is the designated Lead Intelligence Agency and primary border guarding force for the India–Nepal border, deployed since 2001.
• Functions as a Central Armed Police Force (CAPF) under the administrative control of the Ministry of Home Affairs.
• Operates Border Outposts (BOPs) along the frontier to prevent trans-border crime, arms smuggling, narcotics trafficking, human trafficking, and fake currency circulation.
• Implements a “soft border” policing doctrine that facilitates genuine cross-border movement of local populations while curbing unlawful activities.

Supporting Enforcement Agencies

• Armed Police Force (APF) of Nepal: Acts as the primary counterpart force to the SSB on the Nepalese side of the border.
• Central Board of Indirect Taxes and Customs (CBIC): Operates Land Customs Stations (LCS) to regulate lawful commercial cargo and enforce customs laws.
• Narcotics Control Bureau (NCB) and DRI: Coordinate with state police departments of bordering states to counter illicit narcotics flows and commercial contraband.

Border Disputes and Sensitive Sectors

Kalapani–Limpiyadhura–Lipulekh Sector (Uttarakhand)

• The dispute centers on the origin of the Kali River, which marks the boundary under the 1816 Treaty of Sagauli.
• India considers the main stream originating from the springs at Kalapani or the Lipulekh pass as the traditional border, placing the territory within the Pithoragarh district of Uttarakhand.
• Nepal claims the river originates further west from the Limpiyadhura ridgeline, asserting sovereign claims over the entire triangular territory.
• Lipulekh pass serves as a designated trade and pilgrimage route for the Kailash Mansarovar Yatra.

Susta Sector (Bihar)

• Susta is situated on the eastern bank of the Gandak River (known as the Narayani in Nepal), adjacent to West Champaran district of Bihar.
• The dispute arose due to the frequent southward and eastward course-shifting of the Gandak River over several decades, leaving agricultural land originally on one side of the river bed on the opposite bank.

Facts

• The total length of the international boundary between India and Nepal is 1,751 kilometers.
• Bihar shares the longest border with Nepal among all Indian states, spanning 726 kilometers.
• Five Indian states border Nepal: Uttarakhand, Uttar Pradesh, Bihar, West Bengal, and Sikkim.
• The Treaty of Sagauli of 1816 established the Kali River as the western boundary and the Mechi River as the eastern boundary between British India and Nepal.
• Sashastra Seema Bal was originally raised in 1963 as the Special Service Bureau following the 1962 Sino-Indian War.
• The Ministry of Home Affairs designated the SSB as the specialized border guarding force for the India–Nepal border in June 2001.
• Citizens of India and Nepal do not require a passport or visa to travel, reside, or work across the border under the 1950 Peace and Friendship Treaty.
• The Land Ports Authority of India was established under the Land Ports Authority of India Act, 2010, operating under the Ministry of Home Affairs.
• The Motihari–Amlekhganj cross-border petroleum pipeline, inaugurated in 2019, is the first transnational oil pipeline in South Asia.
• The broad-gauge railway link between Jaynagar in Bihar and Kurtha in Nepal was commissioned in April 2022.
• Nepal issued a revised political map in 2020 including the territories of Kalapani, Lipulekh, and Limpiyadhura within its administrative boundaries.
• The Boundary Working Group (BWG) is led by the Surveyor General of India and the Director General of the Survey Department of Nepal.
• The “No Man’s Land” along the India–Nepal border is a demarcated strip extending ten yards on either side of the boundary line.