5Notwithstanding anything in paragraph 3 of this Schedule, the Secretary of State may require any person who has made an objection to state in writing the grounds thereof and may disregard the objection for the purposes of this Schedule if it is an objection which in the opinion of the Secretary of State is frivolous, or which relates exclusively to the assessment of any sum which will fall to be fixed under this Act or any other enactment by the Land Court, or which relates to the assessment of compensation on the compulsory acquisition of land or of an interest in land by virtue of section nine of this Act.