Any notice, order, consent, demand or other document which is required or authorised by or under this Act to be given to or served on any person may, in any case for which no other provision is made by this Act, be given or served either—
by delivering it to that person; or
in the case of a coroner, or a medical officer of health, by leaving it or sending it in a prepaid letter addressed to him, at either his residence or his office and, in the case of any other officer of a council, by leaving it or sending it in a prepaid letter addressed to him, at his office; or
in the case of any other person, by leaving it or sending it in a prepaid letter addressed to him, at his usual or last known residence; or
in the case of an incorporated company or body, by delivering it to their secretary or clerk at their registered or principal office, or by sending it in a prepaid letter addressed to him at that office; or
in the case of a document to be given to or served on a person as being the owner of any premises by virtue of the fact that he receives the rackrent thereof as agent for another, or would so receive it if the premises were let at a rackrent, by leaving it, or sending it in a prepaid letter addressed to him, at his place of business; or
in the case of a document to be given to or served on the owner or the occupier of any premises, if it is not practicable after reasonable inquiry to ascertain the name and address of the person to or on whom it should be given or served, or if the premises are unoccupied, by addressing it to the person concerned by the description of “owner” or “occupier” of the premises (naming them) to which it relates, and delivering it to some person on the premises, or, if there is no person on the premises to whom it can be delivered, by affixing it, or a copy of it, to some conspicuous part of the premises.