Any notice for the purposes of this Act shall be in writing, and any notice or other document required or authorised by or under this Act to be given to or served on any person shall be duly given or served if it is delivered to him or left at his proper address or sent to him by post.

Where any notice or other document is to be given to or served on a person as being the person having any interest in land and it is not practicable after reasonable inquiry to ascertain his name or address, the notice or document may be given or served by addressing it to him by the description of the person having that interest in the land (naming it) and delivering the notice or document to some responsible person on the land or by affixing it, or a copy of it, to some conspicuous object on the land.