7. (1) The Collector shall then cause public notice to be given at convenient places on or near the land to be taken, stating that the Government intends to take possession of the land, and that claims to compensation for all interests in such land may be made to him. (2) Such notice shall state the particulars of the land so needed, and shall require all persons interested in the land to appear personally or by agent before the Collector at a time and place therein mentioned (such time not being earlier than fifteen days after the date of publication of the notice), and to state the nature of their respective interests in the land and the amount and particulars of their claims to compensation for such interests, and their objections (if any) to the measurements of the land. The Collector may in any case require such statement to be made in writing and signed by the party or his agent. (3) The Collector shall also serve notice to the same effect on the occupier (if any) of such land and on all such persons known or believed to be interested therein as reside or have agents authorised to receive service on their behalf, within the district in which the land is situated. (4) In case any person so interested resides elsewhere, and has no such agent, the notice shall be sent to him at his last known residence, address or place of business.