Agreement Between Great Britain and Russia (St. Petersburg, 31 January 1873)

Delimitation Protocol Between Great Britain and Russia (London, 10 September 1885)

Agreement Between Great Britain and Afghanistan (Kabul, 12 November 1893)

Exchange of Notes Between Great Britain and Russia (11 March 1895)

Treaty of Friendship Between Afghanistan and the Soviet Union (Moscow, 28 February 1921)

Treaty Between the Government of Afghanistan and His Britannic Majesty’s Government for the Establishment of Neighbourly Relations (Kabul, 22 November 1921)

Exchange of Notes Regarding the Settlement of Frontier Disputes (Kabul, 13 September 1932)

Frontier Agreement between Afghanistan and the Union of Soviet Socialist Republics (Moscow, 13 June 1946)

Terms of reference of the Helmand River Delta commission and a interpretive statement relative thereto, agreed by Conferees of Afghanistan and Iran (7 September 1950)

Agreement for Technical Cooperation between the Royal Afghan Government and the Government of the United States of America (Kabul, 7 February 1951)

Treaty between the Government of the Union of Soviet Socialist Republics and the Royal Government of Afghanistan concerning the Regime of the Soviet-Afghan State Frontier (Moscow, 18 January 1958)

Protocol between the Union of Soviet Socialist Republics and Afghanistan on the Joint Execution of Works for the Integrated Utilization of the Water Resources in the Frontier Section of the Amudarya (Kabul, 25 June 1958)

Agreement between Afghanistan and Union of Soviet Socialist Republics on economic and technical co-operation (6 February 1968)

The Afghan-Iranian Helmand-River Water Treaty (1973)

Soviet-Afghan Treaty on Border Demarcation (Kabul, 16 June 1981)

Afghanistan and Union of Soviet Socialist Republics. Treaty of friendship, good-neighbourliness and co-operation (Moscow, 5 December 1978)

The Joint Meeting Protocol Delegation of Ministry of Energy &Water, Islamic Republic of Afghanistan and Ministry of Melioration & Water Resources and Ministry of Agriculture and Environment, Republic of Tajikistan (Dushanbe, 3 August 2007)

Memorandum of Understanding between the National Environmental Protection Agency of the Government of the Islamic Republic of Afghanistan and the Committee for Environmental Protection under the Government of the Republic of Tajikistan on Cooperation in the field of environmental protection (Dushanbe, 17 September 2020)