5E+W+SA joint commission shall give an opportunity of appearing and being heard by one or more of its members to—
(a)in any case, the planning authority or, as the case may be, the local planning authority, if the authority so wish,
(b)in the case of a matter mentioned in section 69(2)(a), (b) or (c) of this Act or section 101(2)(a), (b) or (c) of the 1990 Act, the applicant, if he so wishes, and
(c)in the case of an application or appeal mentioned in section 69(2)(a) or (b) of this Act or section 101(2)(a) or (b) of the 1990 Act, any person who has made representations relating to the subject matter of the application or appeal which the planning authority are required to take into account under section 38(1) or (2) of this Act or, as the case may be, the local planning authority are required to take into account under section 71(1) or (2) of the 1990 Act.