The notice required by section 45(3)(b) may be given—
by delivering it to the occupier of the dwelling,
by leaving it for him at the dwelling, or
by sending it by post to him at the dwelling.
The notice required by section 45(4) may be given—
by delivering it to the person who was the occupier of the dwelling immediately before the fire concerned,
by leaving it for him at his proper address, or
by sending it by post to him at that address.
The proper address of a person for the purposes of subsection (2) and section 7 of the Interpretation Act 1978 (c. 30) is—
if he has specified an address in the United Kingdom as his address for the purposes of the notice required by section 45(4), that address;
in any other case, his last known address.
If the name or address of the person to whom notice under section 45(3)(b) or (4) is required to be given cannot be ascertained after reasonable inquiry, the notice may be given—
by leaving it in the hands of a person who is or appears to be resident in the dwelling, or
by leaving it affixed to a conspicuous part of the dwelling.