6.—(1) A fixed penalty payable under section 144C of the 1988 Act shall be treated as having been paid if the amount of £50 is paid before the end of the period of 21 days following the date of the notice given under that section.
(2) A fixed penalty notice under section 144C of the 1988 Act shall state that the fixed penalty payable under that section shall be treated as having been paid if the amount of £50 is paid before the end of the period of 21 days following the date of that notice.