If a designation notice has been given to a person the Treasury may, by further notice, cancel the designation notice.
If a designation notice has been given to a person (including a designation notice as varied by a notice under this subsection), the Treasury may by further notice, vary the earlier notice.
If a further notice under subsection (2) would designate a person in relation to a part of the United Kingdom in relation to which the person was not designated by the earlier notice, sections 131R(3) and (5) and 131S apply in relation to the further notice.