12. The insertion of section 52I(8A) of the 1957 Act by paragraph 2(2) of Schedule 2 to the Act shall not affect the validity of—
(a)any charge preferred under subsection (4) of that section; or
(b)the exercise of any power mentioned in subsection (7)(a) or (b) of that section,
where the charge was preferred or the power exercised before 2nd October 2000.