18In subsection (6) of section 3 of the [1974 c. 43.] Merchant Shipping Act 1974 (under paragraph (a) of which a person who fails to provide information as required by that section is liable on summary conviction to a fine not exceeding £1,000 in some cases and £400 in others and under paragraph (b) of which a person who provides false information is so liable) for paragraph (i) there shall be substituted the words " (i) on summary conviction to a fine not exceeding £500 in the case of an offence under paragraph (a) of this subsection and not exceeding £1,000 in the case of an offence under paragraph (b) of this subsection, and ".