British currency in the Middle East already risen in value against the pound sterling as a result of sterling's devaluation in 1967, and so the new Omani rial was not equal in value to the dinars in the nearby territories. The currency units that are used in Israel, Jordan, Iraq, Kuwait, Bahrain, Oman, and the Yemen are all descended from the pound sterling unit, while the currency units that are used in Saudi Arabia, Qatar, and the United Arab Emirates are all descended from the Maria Theresa Thaler. This largely explains the factor of ten difference in value on average between Bahrain, Kuwait and Oman on
Irish pound in the United Kingdom. From 1938, the means of tender was referred to as the "Irish Pound", after the Constitution of Ireland changed the state's name. The Currency Act, 1927, Adaptation Order, 1938 was the actual mechanism by which change took place. The "Report of the Metric System and Decimal Coinage Committee" (1959) was amongst the first formal reports on decimalisation of the currency, discussion continued into the 1960s on the topic. When the British government decided to decimalise its currency, the Irish government followed suit. The legislative basis for decimalisation in the Republic was the Decimal Currency Act, 1969.