A document in which the British Government exercised its right to separate the territory east of the Jordan River, hence known as Transjordan, from the territory of the Mandate for Palestine. This right originated with Article 25 of the Mandate, as approved by the League of Nations, with the Mandate coming into effect in 1923. The memorandum contains a verbal description of the boundary between Transjordan and the reduced territory of Palestine, largely following the Jordan River, which later served as a basis for delimitation of the border between Israel and Jordan as part of the 1994 peace treaty between the two countries.