The valuation officer shall, within twenty-eight days '. after the date on which a proposal under section 69 of this Act is served on him, or within seven days after the date on: which such a proposal is made by him, as the case may be transmit a copy thereof, together with a statement in writing of the right of objection conferred by subsection (2) of this section, to each of the following persons, not being the maker of the proposal, that is to say—
(a) the occupier of the hereditament to which the proposal relates; and
(b) the rating authority for the area in which the hereditament in question is situated.
Any of the following persons, that is to say, the owner or occupier of the whole or any part of a hereditament to which the proposal relates or the rating authority for the area in which that hereditament is situated, may, within twenty-eight days from the date on which notice is served under subsection (1) of this section on the occupier or, in the case of the rating authority (where they are not the occupier), on the rating authority, serve on the valuation officer notice in writing of objection to the proposal; and, where the proposal was made otherwise than by the valuation officer, the valuation Officer shall, within twenty-eight days of the date on which a notice of objection is served on him, transmit a copy thereof to the maker of the proposal.