Before preparing or reviewing a plan in accordance with section 4 the Commission shall—
(a)consult such persons having knowledge or experience relevant to the Commission's functions as the Commission thinks appropriate,
(b)consult such other persons as the Commission thinks appropriate,
(c)issue a general invitation to make representations, in a manner likely in the Commission's opinion to bring the invitation to the attention of as large a class of persons who may wish to make representations as is reasonably practicable, and
(d)take account of any representations made.