Approval of an acquisition (whether granted unconditionally or subject to conditions) is effective for such period as the appropriate regulator may specify in writing.
Where the appropriate regulator has specified a period under subsection (1), it may extend the period.
Where the appropriate regulator has not specified a period, the approval is effective for one year beginning with the date—
of the notice given under section 189(4)(a) or (b)(i);
on which the appropriate regulator is treated as having given approval under section 189(6); or
of a decision on a reference to the Tribunal which results in the person receiving approval.