(1) If there is a change in any of the particulars given for a third party under section 15(3)(b)(i), the financial agent of the third party must promptly notify the Electoral Commission of the change.
(2) Every financial agent of a third party that is listed as at the first day of any regulated period must, within 20 working days of that date, give the Electoral Commission a written notice that—
(a) confirms that the particulars of the third party recorded in the Electoral Commission's list are still correct; or
(b) corrects the particulars that are incorrect.