In section 7 of the M11972 Act (which relates to the approval or rejection of structure plans by the Secretary of State), for paragraph (b) of subsection (3) there shall be substituted the following paragraph—

“(b)

if, but only if, it appears to him that an examination in public should be held of any matter affecting his consideration of the plan, cause a person or persons, appointed by him for the purpose, to hold such an examination.”.