The CTA has meant that Ireland has been required to follow changes in British immigration policy. This was notable in 1962 when Irish law was changed in response to the Commonwealth Immigrants Act 1962, which imposed immigration controls between the United Kingdom and Commonwealth countries, while in Ireland the "Aliens Order 1962" replaced the state's previous provision exempting all British subjects from immigration control, with one exempting only those born in the United Kingdom. The scope of the Irish provision was much more restrictive than the British legislation as it excluded from immigration control only those British citizens born in the United Kingdom, and imposed immigration controls on those born outside the UK. The latter group would have included individuals who were British citizens by descent or by birth in a British colony. This discrepancy between Britain's and Ireland's definition of a British citizen was not resolved until 1999.