(1) It shall be the duty of the Board to consider any representation from any person relating to, or to facilities in connection with, air transport services by means of aircraft registered in the United Kingdom, or with respect to the tariff or other charges in respect of any such service or facilities:
Provided that the Board shall not be required by this sub-section to consider any representation if in their opinion—
(a) the representation is frivolous or vexatious; or
(b) the matters to which the representation relates have already been sufficiently considered by the Board; or
(c) the matters to which the representation relates are for the time being regulated by an international agreement to which Her Majesty's Government in the United Kingdom is a party.
(2) When the Board have considered any such representation as aforesaid, they shall report to the Minister upon their conclusions, and shall make such recommendations to the Minister in connection with those conclusions as they think expedient:
Provided that this subsection shall not apply to any representation made in connection with an application for the grant of an air service licence or for the purposes of the Board's functions under section three of this Act.