10.—(1) Regulation 17 shall be amended as follows.
(2) In paragraph (1), for the words “by such proportion as may be specified” there shall be substituted “to the sum specified”.
(3) After paragraph (1), there shall be inserted—
“(1A) A charging authority which has served a charge certificate on any person may cancel the charge certificate and serve or cancel such further charge certificates as it thinks fit.”