Under the more liberal provisions of the supplementary agreement, U.K. disability
benefits may be paid to a person in the United States if he or she:
has paid contributions equivalent to about 1 year of coverage under U.K. law, and
has paid or been credited with U.K. contributions equivalent to a year of coverage
in each of the last 2 years before disability onset, or has 2 quarters of U.S. coverage in each of those years.
A person who meets these requirements and is not receiving a U.S. disability benefit
will receive the full U.K. benefit. If the person is receiving a U.S. disability benefit
(either a regular or Totalization benefit), only a partial U.K. benefit will be paid
in proportion to the duration of the person's U.K. coverage.