If the condition of a house which, or a part of which, is let in lodgings, or which is occupied by members of more than one family, is, in the opinion of the local authority, so far defective with respect to any of the following matters, that is to say—
natural and artificial lighting,
ventilation,
water supply,
personal washing facilities,
drainage and sanitary conveniences,
facilities for the storage, preparation and cooking of food, and for the disposal of waste water, or
installations for space heating or for the use of space heating appliances,
a notice specifying the works which in the opinion of the local authority are required for rendering the premises reasonably suitable for such occupation as aforesaid, and requiring the person on whom the notice is served to execute those works.
If the local authority are satisfied that after the service of the notice the number of individuals living on the premises has been reduced to a level which will make the work specified in the notice unnecessary, and that, either in consequence of their exercise of the powers conferred by the following provisions of this Part of this Act to limit the number of persons living on the premises or otherwise, that number will be maintained at or below that level, they may notify in writing the person on whom the notice was served of the withdrawal of the notice, but the withdrawal of the notice shall be without prejudice to the issue of a further notice.
A notice under this section shall require the execution of the works within such period, being not less than twenty-one days from the service of the notice, as may be specified in the notice, but that period may from time to time be extended by written permission of the local authority.
Where a local authority serve a notice on any person under this section they shall inform any other person who is to their knowledge an owner or lessee of the house of the fact that such a notice has been served.