Sections 640 and 641 of the M1Merchant Shipping Act 1894 (which provide for the control by the Trinity House of certain activities of the Commissioners of Northern Lighthouses and the Commissioners of Irish Lights) and section 637 of that Act (which authorises the Trinity House and their servants to enter lighthouses in a lighthouse area which are vested in the said Commissioners or the Trinity House) shall cease to have effect.

In section 668(4) of the Merchant Shipping Act 1894 (which authorises the Commissioners of Northern Lighthouses to elect not more than four other persons as members of their body) for the words “four other persons” there shall be substituted the words “five other persons ; but a person shall not be elected in pursuance of this subsection after section 33(2) of the Merchant Shipping Act 1979 comes into force unless either he appears to the Commissioners to have special knowledge and experience of nautical matters or three persons who so appear are members of the said body”.